UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                              WASHINGTON, DC 20549

                                    FORM 10-Q

(Mark One)
 [X] QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15 (d) OF THE SECURITIES
     EXCHANGE ACT OF 1934

                  For the quarterly period ended March 31, 2000

                                       OR

 [ ] TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
     EXCHANGE ACT OF 1934

         For the transition period from ______________ to ______________

                        Commission File Number 001-15319

                         SENIOR HOUSING PROPERTIES TRUST
             (Exact name of registrant as specified in its charter)

          Maryland                                      04-3445278
(State or other jurisdiction                           (IRS Employer
     of incorporation)                              Identification No.)

       400 Centre Street, Newton, Massachusetts              02458
       (Address of principal executive offices)           (Zip Code)

                                  617-796-8350
              (Registrant's telephone number, including area code)

Indicate  by check  mark  whether  the  registrant:  (1) has filed  all  reports
required to be filed by Section 13 or 15(d) of the  Securities  Exchange  Act of
1934  during  the  preceding  12 months  (or for such  shorter  period  that the
registrant was required to file such reports),  and (2) has been subject to such
filing requirements for the past 90 days. Yes [X] No [ ]

              Number of Common Shares outstanding at May 10, 2000:
           26,001,500 shares of beneficial interest, $0.01 par value.







                         SENIOR HOUSING PROPERTIES TRUST


                                    FORM 10-Q

                                 MARCH 31, 2000

                                      INDEX

                                                                                                                   Page
                                                                                                             
PART I       Financial Information

Item 1.      Consolidated Financial Statements

             Consolidated Balance Sheets - March 31, 2000 and December 31, 1999                                      1

             Consolidated Statements of Income - Three Months Ended March 31, 2000 and 1999                          2

             Consolidated Statements of Cash Flows - Three Months Ended March 31, 2000 and 1999                      3

             Notes to Consolidated Financial Statements                                                              4

Item 2.      Management's Discussion and Analysis of Financial Condition and Results of Operations                   7

Item 3.      Quantitative and Qualitative Disclosures About Market Risk                                              9

PART II      Other Information

Item 5.      Other Information                                                                                      10

Item 6.      Exhibits and Reports on Form 8-K                                                                       13

             Certain Important Factors                                                                              14

             Signatures                                                                                             15







                                           SENIOR HOUSING PROPERTIES TRUST

                                             CONSOLIDATED BALANCE SHEETS
                                       (dollars in thousands, except per share)
                                                     (unaudited)

                                                                                    March 31,           December 31,
                                                                                      2000                  1999
                                                                                   -----------          ------------

                                                                                                 
ASSETS
Real estate properties at cost (including properties leased to affiliates
with a cost of $20,422):
    Land                                                                            $  69,126           $  69,673
    Buildings and improvements                                                        624,066             639,066
                                                                                    ---------           ---------
                                                                                      693,192             708,739
    Accumulated depreciation                                                         (108,340)           (108,709)
                                                                                    ---------           ---------
                                                                                      584,852             600,030

Real estate mortgages receivable, net of loan loss reserve of $14,500                  22,939              22,939
Cash and cash equivalents                                                              12,870              17,091
Other assets                                                                           15,817              13,940
                                                                                    ---------           ---------
                                                                                    $ 636,478           $ 654,000
                                                                                    =========           =========


LIABILITIES AND SHAREHOLDERS' EQUITY
Bank notes payable                                                                  $ 188,000           $ 200,000
Deferred rents and other deferred revenues                                             26,398              26,715
Security deposits                                                                      15,235              15,235
Other liabilities                                                                       5,479               2,644

Shareholders' equity:
    Common shares of beneficial interest, $0.01 par value:
    50,000,000 shares authorized, 26,001,500 shares issued and
    outstanding                                                                           260                260
    Additional paid-in capital                                                        444,511            444,511
    Cumulative net loss                                                               (12,204)            (19,764)
    Distributions                                                                     (31,201)            (15,601)
                                                                                    ---------           ---------
    Total shareholder's equity                                                        401,366             409,406
                                                                                    ---------           ---------
                                                                                    $ 636,478           $ 654,000
                                                                                    =========           =========






                                                See accompanying notes

                                                          1



                                 SENIOR HOUSING PROPERTIES TRUST


                                CONSOLIDATED STATEMENTS OF INCOME
                             (dollars in thousands, except per share)
                                           (unaudited)



                                                                  Three Months Ended March 31,
                                                               ---------------------------------
                                                                 2000                      1999
                                                               --------                  -------
                                                                                  
Revenues:
   Rental income                                                $18,060                  $21,226
   Interest and other income                                        537                    1,442
                                                                -------                  -------
      Total revenues                                             18,597                   22,668
                                                                -------                  -------

Expenses:
   Interest                                                       4,475                    4,976
   Depreciation                                                   5,175                    5,607
   General and administrative                                     1,387                    1,114
                                                                -------                  -------
      Total expenses                                             11,037                   11,697
                                                                -------                  -------

Net income                                                      $ 7,560                  $10,971
                                                                =======                  =======


Weighted average shares outstanding (Note 2)                     26,002                   26,000
                                                                =======                  =======

Basic and diluted  earnings per share data:
   Net income                                                   $  0.29                  $  0.42
                                                                =======                  =======



                                      See accompanying notes

                                                2




                                    SENIOR HOUSING PROPERTIES TRUST


                                 CONSOLIDATED STATEMENTS OF CASH FLOWS
                                         (dollars in thousands)
                                              (unaudited)

                                                                         Three Months Ended March 31,
                                                                       -------------------------------
                                                                         2000                   1999
                                                                       --------               --------
                                                                                       
Cash flows from operating activities:
   Net income                                                          $  7,560               $ 10,971
   Adjustments to reconcile net income to cash provided by operating
   activities:
       Depreciation                                                       5,175                  5,607
       Changes in assets and liabilities:
             Other assets                                                (2,482)                 1,723
             Deferred rents and other deferred revenues                    (317)                  (481)
             Other liabilities                                            1,265                     15
                                                                       --------               --------
       Cash provided by operating activities                             11,201                 17,835
                                                                       --------               --------

Cash flows from investing activities:
   Proceeds from sale of real estate                                     12,178                     --
   Repayments of mortgage loans                                              --                     93
                                                                       --------               --------
       Cash provided by investing activities                             12,178                     93
                                                                       --------               --------

Cash flows from financing activities:
   Repayment of credit facility                                         (12,000)                    --
   Owner's net distribution                                                  --                (17,900)
   Distributions                                                        (15,600)                    --
                                                                       --------               --------
       Cash used for financing activities                               (27,600)               (17,900)
                                                                       --------               --------

(Decrease) increase in cash and cash equivalents                         (4,221)                    28
Cash and cash equivalents at beginning of period                         17,091                    139
                                                                       --------               --------
Cash and cash equivalents at end of period                             $ 12,870               $    167
                                                                       ========               ========


Supplemental cash flow information:
   Cash paid for interest                                              $  4,227                     --
                                                                       ========               ========



                                         See accompanying notes

                                                   3



                         SENIOR HOUSING PROPERTIES TRUST

                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

Note 1.  Organization

Senior  Housing  Properties  Trust  ("Senior  Housing"),  a Maryland real estate
investment  trust, was organized on December 16, 1998 as a 100% owned subsidiary
of HRPT Properties Trust ("HRPT").

At  March  31,  2000,  Senior  Housing  owned  75  properties  and 12  mortgages
receivable in 26 states and operates in a single segment.

On October 12, 1999, HRPT  distributed  49.3% of its ownership in Senior Housing
to HRPT shareholders (the "Spin-Off").  Prior to the Spin-Off the properties and
mortgages  were  owned by HRPT.  These  consolidated  financial  statements  are
presented  as if Senior  Housing was a separate  legal entity from HRPT prior to
the Spin-Off, although no such entity existed until October 12, 1999.

Note 2.  Summary of Significant Accounting Policies

BASIS OF  PRESENTATION.  Prior to the Spin-Off,  Senior  Housing,  including its
properties and mortgages,  were owned by HRPT, and transactions in those periods
have  been  presented  on  HRPT's  historical  basis.   Prior  to  the  Spin-Off
substantially  all the rental income and mortgage  interest  income  received by
HRPT from the tenants and  mortgagors  of Senior  Housing was  deposited  in and
commingled  with HRPT's general funds.  Funds for capital  investments and other
cash  required by Senior  Housing were  provided by HRPT.  Prior to September 1,
1999, interest expense was allocated based on HRPT's historical interest expense
as a percentage of HRPT's average  historical costs of real estate  investments.
General and  administrative  costs of HRPT for the periods prior to the Spin-Off
were allocated to Senior Housing based on HRPT's investment  advisory  agreement
formula and other costs were allocated based on historical costs as a percentage
of HRPT's average historical costs of real estate investments. In the opinion of
management,  the methods for allocating  interest and general and administrative
expenses were  reasonable.  It was not practicable to estimate  additional costs
that would have been incurred by Senior Housing as a separate entity.

In December 1999 the Securities and Exchange  Commission issued Staff Accounting
Bulletin No. 101,  "Accounting for Contingent Rent in Interim Financial Periods"
("SAB 101").  Senior Housing has adopted the provisions of SAB 101 prospectively
as of January 1, 2000. If Senior Housing had elected the adoption  retroactively
to January 1, 1999,  for the three months ended March 31, 1999, net income would
have been  $10.0  million  ($0.38/share).  SAB 101 will have no impact on Senior
Housing's annual results of operations,  rather the accounting  changes required
by SAB 101 are expected to, in general,  defer recognition of certain percentage
rental income from the first,  second and third  quarters to the fourth  quarter
within a fiscal year.

EARNINGS PER COMMON SHARE.  Because Senior Housing's operations were included in
the consolidated financial statements of HRPT prior to the Spin-Off,  there were
no shareholder  equity accounts for Senior Housing prior to 1999.  Common shares
outstanding  of 26.0  million at October  12,  1999,  have been  included in the
earnings per share calculation as if the shares were outstanding for all periods
prior to October 12, 1999.  Earnings  per common  share are  computed  using the
weighted average number of shares outstanding during the period.  Senior Housing
has no common share equivalents,  instruments  convertible into common shares or
other dilutive instruments.

Note 3.  Interim Financial Statements

The financial statements of Senior Housing have been prepared in accordance with
generally accepted accounting  principles for interim financial  information and
with  the   instructions  to  Form  10-Q  and  Rule  10-01  of  Regulation  S-X.
Accordingly,  they do not include all of the information and footnotes  required
by generally accepted  accounting  principles for complete financial  statements
and  should  be read in  conjunction  with the  audited  consolidated  financial
statements for the year ended  December 31, 1999,  included in the Annual Report
on Form 10-K.  In the opinion of  management,  all  adjustments  (consisting  of
normal recurring  accruals)  considered  necessary for a fair  presentation have
been  included.  Operating  results  for  interim  periods  are not  necessarily
indicative of the results that may be expected for the full year.

                                       4


                         SENIOR HOUSING PROPERTIES TRUST

                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS


Note 4.  Real Estate Properties

In February 2000 Senior Housing sold all of the  properties  that were leased to
The Frontier  Group,  Inc.  ("Frontier")  for $13.0  million.  Senior Housing is
pursuing claims against  Frontier and other parties for breach of its leases and
for rental  arrearages.  The amount of net gain,  if any,  which may be realized
from the sale of the Frontier  properties  will depend upon the outcome of these
claims.  The  amount  of  gain  or  loss  to be  realized  as a  result  of this
transaction  is not expected to be material.  The net proceeds of $12.2  million
were used to repay,  in part, a portion of the  outstanding  balance on the bank
credit facility.

Note 5.  Report of Tenants' Financial Condition

Two of Senior Housing tenants,  Mariner Post-Acute Network, Inc. ("Mariner") and
Integrated Health Services, Inc. ("IHS") have filed for protection under Chapter
11 of the U.S.  Bankruptcy Code.  Mariner filed in January 2000 and IHS filed in
February 2000.

         In March 2000 Senior  Housing  reached an agreement  in principle  with
Mariner as follows:

     o    Mariner's lease obligations for all 26 properties will be terminated.
     o    Approximately  $24.0  million  of cash  and  securities  which  secure
          Mariner's obligations will be retained by Senior Housing.
     o    Senior Housing will assume operation  responsibilities for 17 of these
          26 properties.  Title to five of these  properties will be transferred
          to Mariner which will  continue the  operations.  The  remaining  four
          nursing  homes are now  subleased to two private  companies and Senior
          Housing  expects  to  negotiate  with these two  subtenants  for their
          continued operation of those properties.
     o    Mariner will  continue to pay its  contractual  obligations  to Senior
          Housing until the agreement is consummated.

The agreement  with Mariner has been approved by Mariner's  creditors  committee
and the Delaware Bankruptcy Court, before which this bankruptcy is pending. This
agreement still requires regulatory approvals from various states where affected
properties are located.  If this agreement is approved,  Senior Housing  expects
its future earnings and cash flows may be less than the rent  previously  earned
from the  Mariner  lease,  at  least on a short  term  basis.  If and when  this
agreement is implemented additional gains or losses may result.

         In April 2000 Senior Housing reached an agreement in principle with IHS
as follows:

     o    The lease for one  property  will be amended to provide a new ten year
          term at $1.2 million per year, effective January 1, 2000.
     o    Senior Housing's  mortgage  investment secured by one property will be
          cancelled and IHS will continue to own and operate the property.
     o    IHS's  lease  and  mortgage  obligations  for 37  properties  will  be
          terminated.
     o    IHS will pay Senior  Housing  $500,000 per month for use and occupancy
          of  Senior  Housing's  properties  from the  date of IHS's  bankruptcy
          filing until this transaction is closed.
     o    IHS will convey nine  properties to Senior Housing which are currently
          owned and  operated by IHS.
     o    Senior Housing will assume operating responsibility for 41 properties.

In addition,  Horizon/CMS Corporation,  a subsidiary of HEALTHSOUTH Corporation,
(together  "HEALTHSOUTH")  is a  guarantor  of the  lease  obligations  for four
properties  owned by Senior  Housing  and  leased  to IHS.  Senior  Housing  and
HEALTHSOUTH have reached an  understanding,  conditional upon  implementation of
the agreement  between Senior Housing and IHS,  whereby  HEALTHSOUTH will assume
operating  responsibility  for these four  properties  and lease and operate one
property  that will be conveyed  to Senior  Housing by IHS.  Annual  rents under
these five leases total approximately $10.0 million.

                                       5


                         SENIOR HOUSING PROPERTIES TRUST

                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

The agreement with IHS is contingent upon approval by IHS's creditors committees
and the Delaware  Bankruptcy  Court before which this  bankruptcy is pending and
requires regulatory  approvals from various states where affected properties are
located.  If this  agreement  is  approved,  Senior  Housing  expects its future
earnings and cash flows may be less than the rent previously earned from the IHS
leases,  at  least  on a  short  term  basis.  If and  when  this  agreement  is
implemented additional gains or losses may result.

Note 6.  Transactions with Affiliates

Senior  Housing  entered  into  an  investment   advisory  agreement  with  REIT
Management  &  Research,   Inc.  ("REIT   Management")  to  provide  investment,
management and  administrative  services.  REIT Management is owned by Gerard M.
Martin and Barry M. Portnoy, who serve as managing trustees of Senior Housing.

Note 7.  Indebtedness

Senior Housing has a $350.0  million,  three-year,  interest  only,  bank credit
facility. The bank credit facility is secured by 18 properties,  with a net book
value of $377.7  million at March 31,  2000,  and matures in 2002.  The interest
rate is LIBOR plus a premium (7.96% at March 31, 2000). The bank credit facility
is  available  for  acquisitions,  working  capital  and  for  general  business
purposes.  As of March 31,  2000,  $188.0  million  was  outstanding  and $162.0
million was available under the credit facility.

Note 8.  Shareholders' Equity

Senior Housing has reserved  1,300,000  shares of Senior Housing's common shares
under the terms of the 1999  Incentive  Share  Award  Plan (the  "Award  Plan").
During 1999 the three  Independent  Trustees,  as part of their annual fee, were
each  granted  500  common  shares  from this plan.  The  shares  granted to the
Trustees  vest  immediately.  At March 31, 2000,  1,298,500 of Senior  Housing's
common shares remain reserved for issuance under the Award Plan.

In February 2000 Senior Housing paid a distribution of $0.60 per share, or $15.6
million.  In April 2000  Senior  Housing  declared a  distribution  of $0.30 per
share,  or $7.8 million,  which will be distributed to  shareholders on or about
May 25, 2000.


                                       6

                         SENIOR HOUSING PROPERTIES TRUST

Item 2. Management's  Discussion and Analysis of Financial Condition and Results
of Operations

The  following  discussion  presents an analysis of the results of operations of
the  properties and mortgages we owned for the three months ended March 31, 2000
and 1999. This discussion  includes  references to funds from operations.  Funds
from  operations,  or  "FFO",  as  defined  in the  white  paper on  funds  from
operations  which was approved by the Board of Governors of NAREIT in March 1995
and as clarified  from time to time, is net income  computed in accordance  with
GAAP, before  extraordinary  items, plus depreciation and amortization and after
adjustment for unconsolidated  partnerships and joint ventures.  We consider FFO
to be an appropriate  measure of performance for an equity REIT, along with cash
flow from operating  activities,  financing activities and investing activities,
because it provides  investors with an indication of an equity REIT's ability to
incur and service debt, make capital  expenditures,  pay  distributions and fund
other cash needs. We compute FFO in accordance with the standards established by
NAREIT adjusted for the impact of Staff Accounting Bulletin No. 101, "Accounting
for Contingent Rent in Interim Financial Periods",  issued by the Securities and
Exchange  Commission  in December  1999,  and non cash  items,  which may not be
comparable to FFO reported by other REITs that define the term differently.  FFO
does not represent  cash  generated by operating  activities in accordance  with
GAAP and should not be considered as an alternative to net income, determined in
accordance with GAAP, as an indication of financial performance or the cash flow
from operating  activities,  determined in accordance with GAAP, or as a measure
of liquidity.

RESULTS OF OPERATIONS

Three Months Ended March 31, 2000 Compared to March 31, 1999

For the three months  ended March 31,  2000,  compared to the three months ended
March 31,  1999,  total  revenues  decreased  by $4.1  million,  total  expenses
decreased  by  $660,000  and net  income  decreased  by $3.4  million.  Revenues
decreased because no rent was received after the sale date from three properties
formerly owned by Senior  Housing which have been sold and because  reduced rent
and interest was accrued from the properties pursuant to the work out agreements
described below.  Total expenses decreased due to a decrease in interest expense
of  $501,000  and  depreciation  expense of  $432,000,  offset by an increase in
general  and  administrative  expenses  of  $273,000.  The  decrease in interest
expense is primarily due to lower interest expense actually incurred during 2000
as  compared  to HRPT's  allocated  interest  expense in 1999.  The  decrease in
depreciation  expense is primarily  due to the write down for the  impairment of
assets at December 31, 1999, and the sale of three  properties in February 2000.
General and  administrative  expenses increased in 2000 over 1999 because Senior
Housing's expenses were higher than the allocable portion of HRPT's expenses and
because of costs  arising  from the work out  agreements  described  below.  Net
income was $7.6  million and $11.0  million for the three months ended March 31,
2000 and 1999, respectively.

Two of our tenants,  Mariner Post-Acute Network, Inc. ("Mariner") and Integrated
Health Services,  Inc. ("IHS") have filed for protection under Chapter 11 of the
U.S.  Bankruptcy  Code.  Mariner filed in January 2000 and IHS filed in February
2000.

         In March 2000 we reached an  agreement  in  principle  with  Mariner as
follows:

     o    Mariner's lease obligations for all 26 properties will be terminated.
     o    Approximately  $24.0  million  of cash  and  securities  which  secure
          Mariner's obligations will be retained by us.
     o    We  will  assume  operation   responsibilities  for  17  of  these  26
          properties.  Title to five of these  properties will be transferred to
          Mariner which will continue the operations. The remaining four nursing
          homes are now  subleased  to two  private  companies  and we expect to
          negotiate with these two subtenants for their continued  operations of
          these properties.
     o    Mariner will continue to pay its historical contractual obligations to
          us until this agreement is consummated.

The agreement  with Mariner has been approved by Mariner's  creditors  committee
and the Delaware Bankruptcy Court, before which this bankruptcy is pending. This
agreement still requires regulatory approvals from various states where affected
properties  are  located.  If this  agreement  is  approved we expect our future
earnings  and cash flows may be less than the rent  previously  earned  from the
Mariner  lease,  at least on a short term basis.  If and when this  agreement is
implemented additional material gains or losses may result.

                                       7


                         SENIOR HOUSING PROPERTIES TRUST


Item 2. Management's  Discussion and Analysis of Financial Condition and Results
of Operations - continued

         In April 2000 we reached an agreement in principle with IHS as follows:

     o    The lease for one  property  will be amended to provide a new ten year
          term at $1.2 million per year, effective January 1, 2000.
     o    Our mortgage  investment secured by one property will be cancelled and
          IHS will continue to own and operate and mortgage the property.
     o    IHS's  lease  and  mortgage  obligations  for 37  properties  will  be
          terminated.
     o    IHS will pay us  $500,000  per month for use and  occupancy  of Senior
          Housing's  properties from the date of IHS's  bankruptcy  filing until
          this transaction is closed.
     o    IHS will convey  nine  properties  to us.
     o    We will assume operating responsibility for 41 properties.

In addition,  Horizon/CMS Corporation,  a subsidiary of HEALTHSOUTH Corporation,
(together  "HEALTHSOUTH")  is a  guarantor  of the  lease  obligations  for four
properties  leased to IHS. We have  reached an  understanding  with  HEALTHSOUTH
whereby  HEALTHSOUTH  will  assume  operating   responsibility  for  these  four
properties  and one  property  that will be conveyed to us by IHS.  Annual rents
under these five leases total approximately $10.0 million.

The agreement with IHS is contingent upon approval by IHS's creditors committees
and the Delaware  Bankruptcy  Court before which this  bankruptcy is pending and
requires regulatory  approvals from various states where affected properties are
located.  If this  agreement is approved we expect our future  earnings and cash
flows may be less than the rent previously  earned from the IHS leases, at least
on a short term basis.  If and when this  agreement  is  implemented  additional
material gains or losses may result.

FFO for the three months ended March 31, 2000, was $13.3  million,  or $0.51 per
share,  compared  to $16.6  million,  or $0.64 per share for the same  period in
1999. The decrease of $3.3 million is due to the factors  discussed above.  Cash
flow provided by operating  activities and cash available for  distribution  may
not  necessarily  equal funds from  operations as cash flow is affected by other
factors not included in the funds from operations  calculation,  such as changes
in assets and liabilities.

LIQUIDITY AND CAPITAL RESOURCES

At March 31, 2000, we had cash and cash  equivalents of $12.9  million.  For the
three  months  ended March 31, 2000 and 1999,  cash flows  provided by operating
activities  were  $11.2  million  and $17.8  million,  respectively;  cash flows
provided by investing  activities were $12.2 million and $93,000,  respectively;
and cash used for  financing  activities  was $27.6  million and $17.9  million,
respectively.  We expect that our current cash,  cash  equivalents,  future cash
flows from operating  activities and availability under our bank credit facility
will  be  sufficient  to meet  our  short-term  and  long-term  working  capital
requirements,  including our  distribution of $7.8 million,  or $0.30 per share,
for the quarter ending on March 31, 2000,  which we will pay on or about May 25,
2000.

We have a $350.0  million,  three-year,  interest  only,  bank  credit  facility
secured by first  mortgages on 18 properties.  The interest rate is LIBOR plus a
premium per annum.  The bank  credit  facility is  available  for  acquisitions,
working capital and for general business purposes.  We have the ability to repay
and redraw  amounts under this bank credit  facility until its maturity in 2002.
Our  bank  credit   facility   documentation   has  customary   representations,
warranties, covenants and event of default provisions.

During the first quarter of 2000 we repaid $12.0 million of amounts  outstanding
under  our  bank  credit  facility  with  the  proceeds  from  the sale of three
properties.  Subsequent to March 31, 2000 we repaid an additional $10.0 million.
We currently have $178.0 million  outstanding and $172.0 million available under
this credit facility.

Total assets  decreased by $17.5 million from $654.0  million as of December 31,
1999, to $636.5  million as of March 31, 2000.  The decrease is primarily due to
depreciation on real estate  properties and the sale of the three  properties in
February 2000.

                                       8


                         SENIOR HOUSING PROPERTIES TRUST

Item 2. Management's  Discussion and Analysis of Financial Condition and Results
of Operations -continued

Year 2000

We experienced no disruptions in our information and non-information  technology
systems and incurred no costs with respect to year 2000 issues. We are not aware
of any material  problems  resulting from year 2000 issues by our systems or the
systems of our tenants or their material vendors and our material  vendors,  but
will continue to monitor these  systems  throughout  the year to ensure that any
late year 2000 issues that may arise are addressed promptly.

Impact of Inflation

Inflation  might have both  positive  and negative  impacts  upon our  business.
Inflation  might cause the value of our real  estate  investments  to  increase.
Similarly, in an inflationary environment, the percentage rents which we receive
based upon CPI  increases or as a percentage  of our  tenants'  revenues  should
increase.  Also,  rent yields we could charge for new  investments  would likely
increase.  Offsetting these benefits,  inflation might cause our costs of equity
and debt capital to increase.  To mitigate the adverse impact of increased costs
of debt capital in the event of material inflation we may purchase interest rate
cap agreements. The decision to enter into these agreements will be based on the
amount of floating rate debt  outstanding and our belief that material  interest
rate  increases  are likely to occur.  We do not believe  inflation  in the U.S.
economy during the next few years will have any material effect on our business.

Item 3.  Quantitative and Qualitative Disclosures About Market Risk

We are exposed to market changes in interest rates.  Because interest on all our
outstanding  debt is at a  floating  rate,  changes in  interest  rates will not
affect  the value of our  outstanding  debt  instruments.  However,  changes  in
interest rates will affect our operating results. For example, the interest rate
payable on our outstanding indebtedness of $188.0 million at March 31, 2000, was
7.96% per annum.  An immediate  10% change in that  interest  rate or 79.6 basis
points,  would increase or decrease our costs by approximately $1.5 million,  or
$0.06 per share per year:

                       Impact of Changes in Interest Rates
                             (dollars in thousands)

                                                                   Total
                                                                  Interest
                         Interest Rate       Outstanding        Expense Per
                            Per Year            Debt                Year
                         ---------------    --------------     ---------------
At March 31, 2000              7.96%           $188,000            $14,965
10% reduction                  7.16%            188,000             13,461
10% increase                   8.76%            188,000             16,469

The foregoing table presents a so-called  "shock"  analysis,  which assumes that
the interest rate change by 10%, or 79.6 basis points,  is in effect for a whole
year. If interest rates were to change gradually over one year, the impact would
be less.

We borrow in U.S.  dollars  and all of our  current  borrowings  are  subject to
interest at LIBOR plus a premium.  Accordingly,  we are vulnerable to changes in
U.S. dollar based short-term rates, specifically LIBOR.

During the past few months,  short-term  U.S.  dollar based  interest rates have
tended to rise.  We are unable to predict  the  direction  or amount of interest
rate changes  during the next year.  We purchased an interest rate cap agreement
on our current debt to protect against rate increases above 8%. However,  we may
incur  additional  debt at  floating  or fixed  rates in the future  which would
increase our exposure to market changes in interest rates.

We currently own real estate mortgages receivable with a carrying value of $22.9
million.  When comparable term market interest rates decline, the value of these
receivables  increases;  when  comparable  term market  interest rates rise, the
value of these  receivables  declines.  Using discounted cash flow analyses at a
weighted  average  estimated per year market rate for March 31, 2000, of 10.75%,
the estimated fair value of our mortgage receivables was $23.7 million.

                                       9

                         SENIOR HOUSING PROPERTIES TRUST

Item 3.  Quantitative and Qualitative Disclosures About Market Risk - continued

An  immediate  10% change in the market rate of interest,  or 108 basis  points,
applicable to our mortgage  receivables at March 31, 2000, would affect the fair
value of those receivables as follows:

                                          Carrying Value
                        Interest           of Mortgages         Estimated
                      Rate Per Year         Receivable          Fair Value
                      --------------     -----------------    ---------------
                                      (dollars in thousands)
Estimated market           10.75%            $22,939              $23,722
10% reduction               9.68%             22,939               25,256
10% increase               11.83%             22,939               22,328

If the market rate changes  occurred  gradually  over time,  the effect of these
changes would be realized gradually.  Because our mortgages receivable are fixed
rate  instruments,  changes in market  interest rates will have no effect on our
operating results unless these receivables are sold.

The interest  rate changes that affect the  valuations of our mortgages are U.S.
dollar  long-term  rates for  corporate  obligations  of companies  with ratings
similar to our mortgagors.

Item 5.  Other Information

     (a) On May 11,  2000,  the Board of  Trustees  elected  John R.  Hoadley as
Controller of the Company.  Mr.  Hoadley is also the  Controller of  Hospitality
Properties  Trust,  a position he has held since October  1999.  From 1998 until
October 1999, Mr. Hoadley served as the Assistant  Controller of REIT Management
& Research,  Inc., the Company's investment advisor. Mr. Hoadley was employed by
Arthur Andersen LLP from 1993 to 1998,  most recently as a senior auditor,  with
clients primarily in the real estate and utilities industries.  Mr. Hoadley is a
certified public accountant.

     (b)  See  Item 2  above  for  information  with  respect  to the  Company's
previously  disclosed  agreements in principle with Mariner Post-Acute  Network,
Inc.  and its  affiliates  and with  Integrated  Health  Services,  Inc. and its
affiliates.

     (c)  The Company's Board of Trustees has amended and restated the Company's
Bylaws.  The  following  is a summary of certain  provisions  of the Bylaws,  as
amended.  Because it is a summary,  it does not contain  all of the  information
which may be important to a shareholder or other investor. For more information,
the Company refers to the full text of its amended and restated Bylaws which are
being filed as an exhibit to this Quarterly Report on Form 10-Q.

o    The  Company  has  elected to be subject  to Section  3-804(b)  and (c) and
     Section  3-805 of Title 3, Subtitle 8 of the Maryland  General  Corporation
     Law. Those sections:

     o    provide that the number of trustees may be fixed only by a vote of the
          Board of Trustees; and

     o    provide that  vacancies on the Board of Trustees may be filled only by
          the  affirmative  vote of a  majority  of the  remaining  trustees  in
          office, even if the remaining trustees do not constitute a quorum.

o    The amended Bylaws  provide that  nomination of persons for election to the
     Board of Trustees at an annual meeting of  shareholders  and business to be
     transacted by the  shareholders at an annual meeting of shareholders may be
     properly  brought  before the meeting  only (1)  pursuant to the  Company's
     notice of meeting, (2) by or at the direction of the Board of Trustees,  or
     (3) by any  shareholder  who is a shareholder of record both at the time of
     giving of the advance notice  described below and at the time of the annual
     meeting,  who is entitled to vote at the meeting and who complies  with the
     advance notice and other  applicable  terms and provisions set forth in the
     Bylaws.  No business may be transacted at a special meeting of shareholders
     except as specifically designated in the notice of the meeting. Nominations
     of persons for  election  to the Board of Trustees at a special  meeting of

                                       10

                         SENIOR HOUSING PROPERTIES TRUST

     shareholders  at which  trustees  are to be  elected  may be made  only (1)
     pursuant to the Company's notice of meeting;  (2) by or at the direction of
     the Board of Trustees,  or (3) by any  shareholder  who is a shareholder of
     record both at the time of giving of the advance notice described below and
     at the time of the special meeting,  who is entitled to vote at the meeting
     and who complies  with the advance  notice and other  applicable  terms and
     provisions set forth in the Bylaws.

o    The amended  Bylaws  require a  shareholder  who is nominating a person for
     election  to the  Board of  Trustees  at an  annual  meeting  or  proposing
     business  to be  transacted  at an annual  meeting  to give  notice of such
     nomination  or proposal to the  secretary  of the Company at the  principal
     executive  offices of the  Company  not later than the close of business on
     the 90th day nor earlier  than the close of business on the 120th day prior
     to the first  anniversary  of the date of  mailing  of the  notice  for the
     preceding  year's annual meeting.  If the date of mailing of the notice for
     the  annual  meeting is  advanced  or delayed by more than 30 days from the
     anniversary  date of the date of mailing  of the  notice for the  preceding
     year's annual  meeting,  notice by the  shareholder to be timely must be so
     delivered  not earlier than the close of business on the 120th day prior to
     the date of mailing of the notice  for such  annual  meeting  and not later
     than the close of  business  on the later of: (1) the 90th day prior to the
     date of mailing of the notice for such  annual  meeting or (2) the 10th day
     following  the day on which public  announcement  of the date of mailing of
     the  notice  for such  meeting  is first  made by the  Company.  The public
     announcement of a postponement of the mailing of the notice for such annual
     meeting or of an  adjournment  or  postponement  of an annual  meeting to a
     later date or time will not  commence a new time period for the giving of a
     shareholder's  notice. If the number of Trustees to be elected to the Board
     of Trustees is increased and there is no public announcement by the Company
     of such action or specifying the size of the increased Board of Trustees at
     least one hundred (100) days prior to the first  anniversary of the date of
     mailing of notice for the preceding year's annual meeting,  a shareholder's
     notice also shall be considered  timely,  but only with respect to nominees
     for any new positions created by such increase,  if the notice is delivered
     to the secretary at the  Company's  principal  executive  offices not later
     than the close of business on the 10th day immediately following the day on
     which such public announcement first is made by the Company.

o    The amended  Bylaws  require a  shareholder  who is nominating a person for
     election to the Board of Trustees  at a special  meeting at which  trustees
     are to be elected to give notice of such nomination to the secretary of the
     Company at its  principal  executive  offices not earlier than the close of
     business on the 120th day prior to such special  meeting and not later than
     the  close of  business  on the  later  of (1) the  90th day  prior to such
     special  meeting  or (2) the 10th  day  following  the day on which  public
     announcement  is first made of the date of the  special  meeting and of the
     nominees proposed by the Trustees to be elected at such meeting. The public
     announcement  of a postponement  or  adjournment of a special  meeting to a
     later date or time will not  commence a new time period for the giving of a
     shareholder's notice as described above.

o    The amended Bylaws provide that a shareholder's  notice of a nomination for
     election  to the Board of  Trustees  or of a  proposal  of  business  to be
     transacted at a shareholders meeting must be in writing and must include:

     o    as to each  person  whom the  shareholder  proposes  to  nominate  for
          election or  reelection  as a Trustee,  (1) the  person's  name,  age,
          business  address and residence  address,  (2) the class and number of
          shares of  beneficial  interest of the Company  that are  beneficially
          owned or owned of record by such person and (3) all other  information
          relating  to  such  person  that  is  required  to  be   disclosed  in
          solicitations  of proxies  for  election  of  Trustees  in an election
          contest, or is otherwise required, in each case pursuant to Regulation
          14A or any successor  provision  under the Securities  Exchange Act of
          1934,  including such person's  written  consent to being named in the
          proxy statement as a nominee and to serving as a Trustee if elected;

     o    as to any business that the  shareholder  proposes to bring before the
          meeting,  a description  of the business  desired to be brought before
          the meeting,  the reasons for conducting  such business at the meeting
          and any interest of such  shareholder in such business  (including any
          anticipated  benefit  to  the  shareholder   therefrom)  and  of  each
          beneficial owner, if any, on whose behalf the proposal is made; and

     o    as to the shareholder  giving the notice and each beneficial owner, if
          any, on whose behalf the  nomination or proposal is made, (1) the name
          and address of such shareholder, as they appear on the Company's share
          ledger  and  current  name  and  address,  if  different,  of any such
          beneficial owner and (2) the class and number of shares of the Company
          which are owned beneficially and of record by such shareholder and any
          such beneficial owner.

                                       11

                         SENIOR HOUSING PROPERTIES TRUST

o    The  amended  Bylaws  provide  that,  at the  same  time as or prior to the
     submission to the Board of Trustees of any shareholder proposal of business
     to be conducted at an annual or special meeting of the  shareholders  that,
     if  approved or  implemented,  would cause the Company to be in breach of a
     covenant  under any existing or proposed debt  instrument or agreement with
     any lender,  the proponent  shareholder must submit to the secretary of the
     Company  at  the  principal  executive  offices  of  the  Company  evidence
     satisfactory to the Board of Trustees of the lender's  willingness to waive
     the  breach  or a plan for  repayment  of  affected  indebtedness  which is
     satisfactory to the Board of Trustees and which specifically identifies the
     source  of  funds  to be  used  in  the  repayment  and  presents  evidence
     satisfactory  to the Board of Trustees that the  identified  funds could be
     applied by the Company to the repayment.

o    The  amended  Bylaws  provide  that,  at the  same  time as or prior to the
     submission to the Board of Trustees of any shareholder proposal of business
     to be conducted at an annual or special meeting of the  shareholders  that,
     if approved,  could not be implemented by the Company without  notifying or
     obtaining  the consent or approval of any  regulatory  body,  the proponent
     shareholder  must submit to the  secretary of the Company at the  principal
     executive  offices of the  Company  evidence  satisfactory  to the Board of
     Trustees that any and all required notices, consents or approvals have been
     given or obtained or a plan,  satisfactory  to the Board of  Trustees,  for
     making the  requisite  notices  or  obtaining  the  requisite  consents  or
     approvals, as applicable, prior to the implementation of the proposal.

o    The amended  Bylaws  provide that the Company is not required to include in
     its proxy statement a shareholder nomination of persons for election to the
     Board of  Trustees  or a  shareholder  proposal  of  business to be brought
     before an annual or special meeting of  shareholders,  unless the proponent
     shareholder has complied with (1) all applicable  requirements of state and
     federal law and the rules and regulations thereunder,  including Rule 14a-8
     or any successor  provision under the Securities  Exchange Act of 1934, and
     (2) the advance notice and the other applicable procedures and requirements
     set forth in the Bylaws.  This Bylaw provision does not affect any right of
     the  Company  to omit a  shareholder  proposal  from  the  Company's  proxy
     statement under the Securities Exchange Act of 1934, including  nominations
     of persons for election to the Board of Trustees and business to be brought
     before the shareholders at an annual or special meeting of shareholders.

o    The amended  Bylaws  include  provisions  to clarify the  organization  and
     conduct of meetings of  shareholders.  These  include,  among other things,
     that

     o    meetings of shareholders will be conducted by an individual  appointed
          by the Trustees to be chairperson of the meeting or, in the absence of
          such  appointment  or the  absence  of the  appointed  individual,  by
          specified officers of the Company or, in the absence of such officers,
          a  chairperson  chosen by the  shareholders  by the vote of holders of
          shares of  beneficial  interest  representing  a majority of the votes
          cast by shareholders present in person or represented by proxy;

     o    the  order of  business  and all other  matters  of  procedure  at any
          meeting of  shareholders  will be determined by the chairperson of the
          meeting;

     o    the  chairperson of the meeting may prescribe such rules,  regulations
          and  procedures  and take such actions as, in the  discretion  of such
          chairperson,  are  appropriate  for the proper conduct of the meeting,
          including,  without limitation:  (1) restricting admission to the time
          set for the  commencement of the meeting;  (2) limiting  attendance at
          the  meeting  to  shareholders  of record of the  Company,  their duly
          authorized  proxies or other such  persons as the  chairperson  of the
          meeting may determine;  (3) limiting  participation  at the meeting on
          any matter to shareholders  of record of the Company  entitled to vote
          on such matter, their duly authorized proxies or other such persons as
          the  chairperson of the meeting may  determine;  (4) limiting the time
          allotted to questions  or comments by  participants;  (5)  maintaining
          order and security at the meeting;  (6)  removing any  shareholder  or
          other person who refuses to comply with meeting  procedures,  rules or
          guidelines  as set forth by the  chairperson  of the meeting;  and (7)
          recessing or adjourning the meeting to a later date and time and place
          announced at the meeting; and

     o    unless  otherwise  determined  by  the  chairperson  of  the  meeting,
          meetings of  shareholders  are not  required to be held in  accordance
          with the rules of parliamentary  procedure or any established rules of
          order.

         As  stated in the  Company's  proxy  statement  dated  March  23,  2000
relating to the annual meeting of shareholders held on May 9, 2000,  shareholder
proposals  intended to be  presented  at the  Company's  2001 Annual

                                       12

                         SENIOR HOUSING PROPERTIES TRUST

Meeting of Shareholders pursuant to Rule 14a-8 under the Securities Exchange Act
of 1934 must be received by the Company at its principal  executive  offices not
later than December 1, 2000.

         Under the amended Bylaws, in order to be considered "timely" within the
meaning of Rule 14a-4(c) under the Securities  Exchange Act of 1934, notice of a
shareholder  proposal  intended for  presentation  at the Company's  2001 Annual
Meeting of Shareholders made outside of Rule 14a-8 under the Securities Exchange
Act of 1934 must be received by the Company no later than January 2, 2001 and no
earlier than December 1, 2000, rather than respective dates which were specified
in the  Company's  proxy  statement  dated March 31,  2000,  and must be made in
accordance  with the  provisions,  requirements  and procedures set forth in the
Company's amended Bylaws.

Item 6.  Exhibits and Reports on Form 8-K

     (a) Exhibits:

          3.1  Articles Supplementary of the Company. (Filed herewith.)

          3.2  Amended and Restated Bylaws of the Company. (Filed herewith.)

          10.1 Settlement  Agreement,  dated as of March  20th, 2000, among the
               Company,  SPTMNR  Properties Trust, Five Star Quality Care, Inc.,
               SHOPCO-AZ, LLC, SHOPCO-CA, LLC, SHOPCO-COLORADO,  LLC, SHOPCO-WI,
               LLC,  Mariner  Post-Acute  Network,  Inc.,  GranCare,  Inc.,  AMS
               Properties,  Inc.  and  GCI  Health  Care  Centers,  Inc.  (Filed
               herewith.)

          10.2 Settlement  Agreement,  dated as of April  11,  2000,  among  the
               Company,  SPTIHS Properties Trust,  HRES1 Properties Trust, HRES2
               Properties   Trust,   SHOPCO-COLORADO,   LLC,   SHOPCO-CT,   LLC,
               SHOPCO-GA,  LLC, SHOPCO-IA,  LLC, SHOPCO-KS, LLC, SHOPCO-MA, LLC,
               SHOPCO-MI,  LLC, SHOPCO-MO,  LLC, SHOPCO-NE, LLC, SHOPCO-WY, LLC,
               SNH-NEBRASKA,  INC.,  SNH-IOWA,  INC.,  SNH-MASSACHUSETTS,  INC.,
               SNH-MICHIGAN,  INC.,  Five  Star  Quality  Care,  Inc.,  Advisors
               Healthcare  Group,  Inc.,   Integrated  Health  Services,   Inc.,
               Community Care of America,  Inc., ECA Holdings,  Inc.,  Community
               Care of Nebraska, Inc., W.S.T. Care, Inc., Quality Care of Lyons,
               Inc., CCA Acquisition I, Inc., MARIETTA/SCC,  Inc., Glenwood/SCC,
               Inc., Dublin/SCC,  Inc., College Park/SCC,  Inc., IHS Acquisition
               No. 108, Inc., IHS Acquisition No. 112, Inc., IHS Acquisition No.
               113, Inc., IHS  Acquisition  No. 135, Inc., IHS  Acquisition  No.
               148, Inc., IHS  Acquisition  No. 152, Inc., IHS  Acquisition  No.
               153, Inc., IHS  Acquisition  154, Inc., IHS  Acquisition No. 155,
               Inc., IHS Acquisition No. 175, Inc.,  Integrated  Health Services
               at Grandview  Care Center,  Inc.,  ECA  Properties,  Inc., CCA of
               Midwest,   Inc.  and  Quality  Care  of  Columbus,   Inc.  (Filed
               herewith.)

          27.  Financial Data Schedule. (Filed herewith.)

     (b) Reports on Form 8-K:

              None.
                                       13


                         SENIOR HOUSING PROPERTIES TRUST


CERTAIN IMPORTANT FACTORS

This  Quarterly  Report  on  Form  10-Q  contains  statements  which  constitute
forward-looking  statements within the meaning of the Securities Exchange Act of
1934,  as amended.  Those  statements  appear in a number of places on this Form
10-Q and  include  statements  regarding  our  beliefs,  intent  or  expectation
concerning  projections,  plans,  future events and performance.  The estimates,
assumptions  and  statements,  such  as  those  relating  to  the  approval  and
consummation  of the  Mariner  and IHS  agreements,  our  ability to operate and
stabilize  operations  at  the  Mariner  and  IHS  properties,  our  ability  to
successfully  negotiate with Mariner's subtenants and our ability to make future
distributions,  depend  upon  various  factors  over some of which we and/or our
lessees have or may have limited or no control.  Readers are cautioned  that any
such forward  looking  statements are not guarantees of future  performance  and
involve risks and  uncertainties,  and that actual results may differ materially
from those contained in the forward looking  statements.  Material changes could
occur  as  a  result  of  numerous  factors.  Those  factors  include,   without
limitation,  our ability to successfully  operate the Mariner and IHS properties
whose  operations  we assume,  the status of the economy,  status of the capital
markets (including  prevailing  interest rates),  compliance with the changes to
regulations within the healthcare industry,  competition in both the real estate
and healthcare industries,  changes to federal, state, and local legislation and
other factors.  We cannot predict the impact of these factors,  if any. However,
these  factors  could  cause our actual  results  for  subsequent  periods to be
different  from  those  stated,  estimated  or assumed  in this  discussion  and
analysis of our financial  condition and results of operations.  We believe that
our estimates  and  assumptions  are  reasonable  and prudent at this time.  The
information  contained in this Form 10-Q,  including the  information  under the
heading "Management's Discussion and Analysis of Financial Condition and Results
of Operations", identifies other important factors that could cause differences.

THE AMENDED AND RESTATED  DECLARATION OF TRUST  ESTABLISHING THE COMPANY,  DATED
SEPTEMBER 20, 1999, A COPY OF WHICH,  TOGETHER WITH ALL AMENDMENTS  THERETO (THE
"DECLARATION"),  IS  DULY  FILED  IN THE  OFFICE  OF  THE  STATE  DEPARTMENT  OF
ASSESSMENTS  AND TAXATION OF MARYLAND,  PROVIDES  THAT THE NAME "SENIOR  HOUSING
PROPERTIES  TRUST" REFERS TO THE TRUSTEES UNDER THE DECLARATION  COLLECTIVELY AS
TRUSTEES,  BUT NOT  INDIVIDUALLY  OR PERSONALLY,  AND THAT NO TRUSTEE,  OFFICER,
SHAREHOLDER,  EMPLOYEE  OR AGENT OF THE  COMPANY  SHALL BE HELD TO ANY  PERSONAL
LIABILITY,  JOINTLY OR SEVERALLY,  FOR ANY OBLIGATION OF, OR CLAIM AGAINST,  THE
COMPANY.  ALL PERSONS DEALING WITH US, IN ANY WAY, SHALL LOOK ONLY TO THE ASSETS
OF SENIOR HOUSING PROPERTIES TRUST FOR THE PAYMENT OF ANY SUM OR THE PERFORMANCE
OF ANY OBLIGATION.


                                       14





                                   SIGNATURES

Pursuant  to the  requirements  of the  Securities  Exchange  Act of  1934,  the
registrant  has duly  caused  this  report  to be  signed  on its  behalf by the
undersigned, thereunto duly authorized.

                                   SENIOR HOUSING PROPERTIES TRUST


                                   By:/s/ David J. Hegarty
                                      David J. Hegarty
                                      President and Chief Operating Officer
                                      Dated:  May 12, 2000

                                   By:/s/ Ajay Saini
                                      Ajay Saini
                                      Treasurer and Chief Financial Officer
                                      Dated:  May 12, 2000


                                       15