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 June 30, 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 August 10, 2000:
           25,916,100 shares of beneficial interest, $0.01 par value.






                                             SENIOR HOUSING PROPERTIES TRUST


                                                        FORM 10-Q

                                                      JUNE 30, 2000

                                                          INDEX
                                                                                                                   Page

                                                                                                             

PART I       Financial Information

Item 1.      Financial Statements (unaudited)

             Consolidated Balance Sheets - June 30, 2000 and December 31, 1999                                       1

             Consolidated Statements of Income - Three and Six Months Ended June 30, 2000 and 1999                   2

             Consolidated Statements of Cash Flows -Six Months Ended June 30, 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                                             10

PART II      Other Information

Item 2.      Changes in Securities                                                                                  11

Item 4.      Submission of Matters to a Vote of Security Holders                                                    11

Item 6.      Exhibits and Reports on Form 8-K                                                                       11

             Certain Important Factors                                                                              13

             Signatures                                                                                             14





                                                   SENIOR HOUSING PROPERTIES TRUST


                                                     CONSOLIDATED BALANCE SHEETS
                                                       (dollars in thousands)
                                                             (unaudited)

                                                                                         June 30,                     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                                                              (113,482)                     (108,709)
                                                                                         ---------                     ---------
                                                                                           579,710                       600,030

Real estate mortgages receivable, net of loan loss reserve of $14,500                       22,939                        22,939
Cash and cash equivalents                                                                   10,770                        17,091
Other assets                                                                                18,076                        13,940
                                                                                         ---------                     ---------
                                                                                         $ 631,495                     $ 654,000
                                                                                         =========                     =========


LIABILITIES AND SHAREHOLDERS' EQUITY
Bank notes payable                                                                       $ 182,000                     $ 200,000
Deferred rents and other deferred revenues                                                  25,991                        26,715
Security deposits                                                                           15,235                        15,235
Other liabilities                                                                            7,423                         2,644

Shareholders' equity:
    Common shares of beneficial interest, $0.01 par value:
       50,000,000 shares authorized, 26,003,000 shares and 26,001,500
        shares issued outstanding, respectively                                                260                           260
    Additional paid-in capital                                                             444,524                       444,511
    Cumulative net loss                                                                     (4,936)                      (19,764)
    Distributions                                                                          (39,002)                      (15,601)
                                                                                         ---------                     ---------
       Total shareholder's equity                                                          400,846                       409,406
                                                                                         ---------                     ---------
                                                                                         $ 631,495                     $ 654,000
                                                                                         =========                     =========



                                                       See accompanying notes


                                                                 1




                                          SENIOR HOUSING PROPERTIES TRUST


                                         CONSOLIDATED STATEMENTS OF INCOME
                                              (dollars in thousands)
                                                    (unaudited)



                                                    Three Months Ended June 30,          Six Months Ended June 30,
                                                   ----------------------------         --------------------------
                                                      2000            1999                 2000             1999
                                                   ----------------------------         --------------------------
                                                                                             

Revenues:
   Rental income                                    $18,196         $21,183               $36,256         $42,409
   Interest and other income                            436           1,439                   973           2,881
                                                    -------         -------               -------         -------
      Total revenues                                 18,632          22,622                37,229          45,290
                                                    -------         -------               -------         -------

Expenses:
   Interest                                           3,924           5,016                 8,399           9,992
   Depreciation                                       5,142           5,600                10,317          11,207
   General and administrative                         2,298           1,145                 3,685           2,259
                                                    -------         -------               -------         -------
      Total expenses                                 11,364          11,761                22,401          23,458
                                                    -------         -------               -------         -------

Net income                                          $ 7,268         $10,861               $14,828         $21,832
                                                    =======         =======               =======         =======


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

Basic and diluted  earnings per share data:
   Net income                                       $  0.28         $  0.42               $  0.57         $  0.84
                                                    =======         =======               =======         =======







                                              See accompanying notes

                                                        2






                                          SENIOR HOUSING PROPERTIES TRUST


                                       CONSOLIDATED STATEMENTS OF CASH FLOWS
                                              (dollars in thousands)
                                                    (unaudited)
                                                                                      Six Months Ended June 30,
                                                                                    ----------------------------

                                                                                      2000                1999
                                                                                    --------            --------
                                                                                                 
Cash flows from operating activities:
   Net income                                                                       $ 14,828            $ 21,832
   Adjustments to reconcile net income to cash provided by operating
   activities:
       Depreciation                                                                   10,317              11,207
       Changes in assets and liabilities:
           Other assets                                                               (4,728)                636
           Deferred rents and other deferred revenues                                   (724)               (897)
           Other liabilities                                                           3,209                  30
                                                                                    --------            --------
       Cash provided by operating activities                                          22,902              32,808
                                                                                    --------            --------

Cash flows from investing activities:
Proceeds from sale of real estate                                                     12,178                  --
Repayments of mortgage loans                                                              --                 188
                                                                                    --------            --------
       Cash provided by investing activities                                          12,178                 188
                                                                                    --------            --------

Cash flows from financing activities:
   Repayment of credit facility                                                      (22,000)                 --
   Draws on credit facility                                                            4,000
   Owner's net distribution                                                               --             (32,967)
   Distributions to shareholders                                                     (23,401)                 --
                                                                                    --------            --------
       Cash used for financing activities                                            (41,401)            (32,967)
                                                                                    --------            --------

(Decrease) increase in cash and cash equivalents                                      (6,321)                 29
Cash and cash equivalents at beginning of period                                      17,091                 139
                                                                                    --------            --------
Cash and cash equivalents at end of period                                          $ 10,770            $    168
                                                                                    ========            ========


Supplemental cash flow information:
   Cash paid for interest                                                           $  8,208                 $--
                                                                                    ========            ========





                                              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").

On October 12, 1999, HRPT  distributed  50.7% 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.

At June 30, 2000, Senior Housing owned 78 properties and 12 mortgages receivable
in 26 states and operates in a single segment.

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 and six months ended June 30, 1999, net income
would have been $10.1 million  ($0.39/share)  and $20.4  million  ($0.78/share),
respectively.  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").  Senior  Housing's  claims for rental
arrearages and breach of its lease  obligations are pending in court. The amount
of net gain, if any, from the sale of the Frontier  properties  will depend upon
the outcome of these claims and is not expected to be material.

Note 5.  Report of Tenants' Financial Condition

Two  of  Senior  Housing  larger  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 June 2000 Senior Housing's  restructuring agreement with Mariner was approved
by the bankruptcy court. Full  implementation of this restructuring  transaction
is still  contingent upon Senior Housing  obtaining  regulatory  approval in the
states where these properties are located. This restructuring agreement provides
as follows:

     o    Mariner's lease obligations for all 26 properties are terminated.
     o    $15.0  million of cash,  1,000,000  common  shares of HRPT and 100,000
          shares of Senior  Housing's  common  shares  which  secured  Mariner's
          obligations to be retained by Senior Housing.
     o    Senior Housing  assumes  operating  responsibilities  for 17 of the 26
          properties.  Ownership of five of these  properties is  transferred to
          Mariner.  The  remaining  four nursing  homes are now subleased to two
          private  companies and Senior  Housing is  negotiating  with these two
          subtenants  for  their  continued  operation  of those  properties.
     o    Mariner continued to pay its contractual obligations to Senior Housing
          until June 30, 2000.

In July 2000 Senior Housing's  restructuring  agreement with IHS was approved by
the bankruptcy court. Full  implementation of this restructuring  transaction is
still contingent upon Senior Housing obtaining  regulatory approval in the state
where these properties are located.  This  restructuring  agreement  provides as
follows:

     o    The lease for one  property  is 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  is
          cancelled and IHS will continue to own and operate the property.
     o    IHS's lease and mortgage obligations for 37 properties are terminated.
     o    IHS paid Senior  Housing  $600,000 per month for use and  occupancy of
          Senior Housing's  properties from the date of IHS's bankruptcy  filing
          until June 30, 2000.
     o    IHS conveyed nine  properties to Senior Housing which were  previously
          owned and operated by IHS.
     o    Senior Housing will assume operating responsibility for 41 properties,
          effective July 1, 2000.

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. HEALTHSOUTH in the process
of assuming operating responsibility for these four properties. Also HEALTHSOUTH
will lease and operate one property that was conveyed to Senior  Housing by IHS.
Annual rents under these five leases total approximately $10.0 million.

The bankruptcy  filings and  restructuring  agreements  with Mariner and IHS are
expected to adversely impact Senior Housing's  revenues and net income which may
be realized in the future by Senior Housing,  at least on a short term basis. As
a result of the closing of these  transactions,  significant gains or losses may
result in the quarter ended September 30, 2000.

Subject to, and pending regulatory  approval where these properties are located,
these properties being managed on behalf of Mariner and IHS by Five Star Quality
Care, Inc., an affiliate of Senior Housing.

                                       5


                         SENIOR HOUSING PROPERTIES TRUST

                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

On June 22, 2000,  Multicare,  a  non-consolidated  subsidiary of Genesis Health
Ventures,  Inc., a tenant that leases one  property  from Senior  Housing  filed
bankruptcy. SNH's annual rent from this property is $1.5 million. As of July 31,
2000, Multicare is current on its lease obligations to Senior Housing.

Note 6.  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 $375.0 million at June 30, 2000, and matures in 2002. The interest rate
is LIBOR plus a premium  (8.63% at June 30, 2000).  The bank credit  facility is
available for acquisitions,  working capital and for general business  purposes.
As of June 30,  2000,  $182.0  million was  outstanding  and $168.0  million was
available under the credit facility.

Note 7.  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").  In
May 2000 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 June 30, 2000, 1,297,000 of Senior Housing's common shares
remain reserved for issuance under the Award Plan.

On August 1, 2000,  pursuant to our incentive share award plan, our officers and
certain key employees of our advisor,  REIT Management & Research Inc., received
grants  aggregating 13,100 common shares valued at $8.625 per share, the closing
price of the common shares on the New York Stock Exchange on August 1, 2000. The
grants were made  pursuant  to the  exemption  from  registration  contained  in
Section 4(2) of the Securities Act of 1933, as amended.

In May 2000 Senior  Housing paid a  distribution  to  shareholders  of $0.30 per
share, or $7.8 million.  In July 2000 Senior Housing  declared a distribution of
$0.30 per share,  or $7.8 million,  which will be distributed to shareholders on
or about August 24, 2000.

In connection  with the  restructuring  agreement  with Mariner,  Senior Housing
received  100,000 of its own common shares and,  effective  July 1, 2000,  these
shares were cancelled.

Note 8.  Subsequent Events

On July 27, 2000,  Senior Housing entered an agreement to sell four  independent
living properties leased to Brookdale Living Communities, Inc. for $123 million.
Senior Housing  acquired  these  properties in December 1996 and May 1997 for an
investment of $101.9 million. Senior Housing expects to record a gain on sale of
approximately  $26 million when the transaction  closes on or before October 31,
2000. Proceeds from the sale will be applied against the bank credit facility.


                                       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 and six months ended June
30, 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 the  National
Association  of Real Estate  Investment  Trusts  ("NAREIT") in March 1995 and as
clarified from time to time, is net income computed in accordance with Generally
Accepted  Accounting  Principles  ("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 for 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 June 30, 2000 Versus 1999

For the three  months  ended June 30,  2000,  compared to the three months ended
June  30,  1999,  total  revenues  decreased  by $4.0  million,  total  expenses
decreased  by  $397,000  and net  income  decreased  by $3.6  million.  Revenues
decreased  because no rent was  received  from three  properties  sold by Senior
Housing and because  reduced rent and  interest was accrued from the  properties
pursuant to the  restructuring  agreements with Mariner and IHS described below.
Total expenses  decreased due to a decrease in interest  expense of $1.1 million
and  depreciation  expense of  $458,000  offset by an  increase  in general  and
administrative  expenses of $1.2  million.  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  due to costs  related  to the
restructuring  agreements with IHS and Mariner.  Net income was $7.3 million and
$10.9 million for the three months ended June 30, 2000 and 1999, respectively.

Two of Senior Housing larger tenants,  Mariner and 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 June 2000 Senior Housing's  restructuring agreement with Mariner was approved
by  the  bankruptcy  court.  The  full   implementation  of  this  restructuring
transaction  is  still  contingent  upon  Senior  Housing  obtaining  regulatory
approval in the states where these  properties  are located.  The  restructuring
agreement provides as follows:

     o    Mariner's lease obligations for all 26 properties are terminated.
     o    $15.0  million of cash,  1,000,000  common  shares of HRPT and 100,000
          shares of Senior  Housing's  common  shares  which  secured  Mariner's
          obligations to be retained by Senior Housing.
     o    Senior Housing  assumes  operating  responsibilities  for 17 of the 26
          properties.  Ownership of five of these  properties is  transferred to
          Mariner.  The  remaining  four nursing  homes are now subleased to two
          private  companies and Senior  Housing is  negotiating  with these two
          subtenants for their continued operation of those properties.
     o    Mariner continued to pay its contractual obligations to Senior Housing
          until June 30, 2000.


                                       7


                         SENIOR HOUSING PROPERTIES TRUST


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

In July 2000 Senior Housing's  restructuring  agreement with IHS was approved by
the bankruptcy  court. This  restructuring  transaction is still contingent upon
Senior  Housing  obtaining   regulatory  approval  in  the  states  where  these
properties are located. This restructuring agreement provides as follows:

     o    The lease for one  property  is 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  is
          cancelled and IHS will continue to own and operate the property.
     o    IHS's lease and mortgage obligations for 37 properties are terminated.
     o    IHS paid Senior  Housing  $600,000 per month for use and  occupancy of
          Senior Housing's  properties from the date of IHS's bankruptcy  filing
          through June 30, 2000.
     o    IHS conveyed nine  properties to Senior Housing which were  previously
          owned and operated by IHS.
     o    Senior Housing will assume operating responsibility for 41 properties,
          effective July 1, 2000.

In addition HEALTHSOUTH  Corporation is a guarantor of the lease obligations for
four properties owned by Senior Housing and leased to IHS. HEALTHSOUTH is in the
process of assuming  operating  responsibility  for these four properties.  Also
HEALTHSOUTH will lease and operate one additional  property that was conveyed to
Senior Housing by IHS. Annual rents under these five leases total  approximately
$10.0 million.

The bankruptcy  filings and  restructuring  agreements  with Mariner and IHS are
expected to adversely impact Senior Housing's  revenues and net income which may
be realized in the future by Senior Housing,  at least on a short term basis. As
a result of the closing of these transactions, gains or losses may result in the
quarter ended September 30, 2000.

Subject to, and pending   regulatory  approval where the properties are located,
these  properties  are being  managed on behalf of Mariner  and IHS by Five Star
Quality Care, Inc., an affiliate of Senior Housing.

FFO for the three  months  ended June 30, 2000 was $13.2  million,  or $0.51 per
share,  compared  to $16.5  million,  or $0.63 per share for the same  period in
1999. The decrease of $3.3 million is due mainly 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.

Six Months Ended June 30, 2000 Compared to June 30, 1999

For the six months  ended June 30,  2000,  compared to the six months ended June
30, 1999, total revenues decreased by $8.0 million,  total expenses decreased by
$1.1  million  and net income  decreased  by $7.0  million.  Revenues  decreased
because rent from three  properties  sold by Senior Housing and because  reduced
rent and interest was accrued from the properties  pursuant to the restructuring
agreements described  previously.  Total expenses decreased due to a decrease in
interest expense of $1.6 million and depreciation  expense of $890,000 offset by
an increase in general and administrative expenses of $1.4 million. 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  due to costs
related to the  restructuring  agreements  with IHS and Mariner.  Net income was
$14.8 million and $21.8 million for the six months ended June 30, 2000 and 1999,
respectively.

FFO for the six months ended June 30, 2000 was $26.5 million or $1.02 per share,
compared to $33.0  million,  or $1.27 per share for the same period in 1999. The
decrease of $6.5 million is due mainly 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.


                                       8


                         SENIOR HOUSING PROPERTIES TRUST

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

LIQUIDITY AND CAPITAL RESOURCES

We have a $350 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.  We  currently  have $182  million
outstanding and $168 million available for borrowing under this credit facility.

At June 30, 2000, we had cash and cash equivalents of $10.8 million. For the six
months ended June 30, 2000 and 1999, cash flows provided by operating activities
were $22.9  million  and $32.8  million,  respectively;  cash flows  provided by
investing activities were $12.2 million and $188,000 respectively; and cash used
for financing activities and distributions to shareholders was $41.4 million and
$33.0 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 the distribution of $7.8 million, or $0.30 per
share,  for the quarter  ended on June 30,  2000,  which we will pay on or about
August 24, 2000.

Total assets  decreased by $22.5 million from $654.0  million as of December 31,
1999,  to $631.5  million as of June 30, 2000.  The decrease is primarily due to
depreciation on real estate  properties,  distributions  to shareholders and the
sale of three properties in February 2000.

On July 27, 2000,  Senior Housing entered an agreement to sell four  independent
living properties leased to Brookdale Living Communities, Inc. for $123 million.
Senior Housing  acquired  these  properties in December 1996 and May 1997 for an
investment of $101.9 million. Senior Housing expects to record a gain on sale of
approximately  $26 million when the transaction  closes on or before October 31,
2000. Proceeds from the sale will be applied against the bank credit facility.

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,  the
systems of our tenants or their material vendors,  or our material vendors;  but
we 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 a percentage of our tenants'  revenues  should  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;
however,  we are now  studying  the impact that wage  inflation  may have on the
results of operations which we may realize from properties  formerly operated by
Mariner and IHS as these operations are assumed by us effective July 1, 2000.


                                       9


                         SENIOR HOUSING PROPERTIES TRUST


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 $182.0 million at June 30, 2000, was
8.63% per annum.  An immediate  10% change in that  interest  rate or 86.3 basis
points,  would increase or decrease our costs by approximately $1.6 million,  or
$0.06 per share per year:


                       Impact of Changes in Interest Rates
                             (dollars in thousands)

                                                                     Total
                           Interest Rate       Outstanding          Interest
                              Per Year            Debt            Expense Per
                                                                      Year
                           ---------------    --------------     ---------------
At June 30, 2000                 8.63%           $182,000           $15,707
10% reduction                    7.77%            182,000            14,141
10% increase                     9.49%            182,000            17,272

The foregoing table presents a so-called  "shock"  analysis,  which assumes that
the interest rate change by 10%, or 86.3 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 years,  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 have  purchased  an  interest  rate cap
agreement  on all our current debt to protect  against  rate  increases of LIBOR
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.

At June 30, 2000 we owned 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 June 30, 2000 of 10.75%,
the  estimated  fair value of our mortgage  receivables  was $23.7  million.  An
immediate  10%  change in the  market  rate of  interest,  or 108 basis  points,
applicable to our mortgage  receivables at June 30, 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.  Substantially  all of  our  outstanding  mortgage
receivables  have  been  cancelled  by   implementations  of  the  restructuring
agreements with Mariner and IHS effective July 1, 2000.


                                       10


                         SENIOR HOUSING PROPERTIES TRUST


Part II.          Other Information

Item 2.  Changes in Securities

On May  11,  2000,  pursuant  to our  incentive  share  award  plan,  our  three
independent trustees each received a grant of 500 (total 1,500) common shares of
beneficial  interest,  par value $0.01 per share, valued at $9.00 per share, the
closing  price of the common  shares on the New York Stock  Exchange  on May 11,
2000. The grants were made pursuant to an exemption from registration  contained
in section 4(2) of the  Securities Act of 1933, as amended.  In connection  with
the restructuring agreement with Mariner, Senior Housing received 100,000 of its
own common shares and, effective July 1, 2000, these shares were cancelled.

On August 1, 2000,  pursuant to our incentive share award plan, our officers and
certain key employees of our advisor,  REIT Management & Research Inc., received
grants  aggregating 13,100 common shares valued at $8.625 per share, the closing
price of the common shares on the New York Stock Exchange on August 1, 2000. The
grants were made  pursuant  to the  exemption  from  registration  contained  in
Section 4(2) of the Securities Act of 1933, as amended.

Item 4.  Submission of matters to a vote of Security Holders

At our regular annual meeting of shareholders held on May 11, 2000, Dr. Bruce M.
Gans, M.D. and Mr. Barry M. Portnoy were re-elected trustees  (24,739,583 shares
voted for and votes with  respect to 199,517  shares  withheld  for Dr. Gans and
24,735,922  shares voted for and votes with respect to 203,178  shares  withheld
for Mr.  Portnoy).  The term of Dr. Gans and Mr.  Portnoy  will extend until our
annual meeting of shareholders in 2003.  Messrs.  John L. Harrington,  Gerard M.
Martin and  Arthur G.  Koumantzelis  continue  to serve as  trustees  with terms
expiring in 2001, 2001, and 2002, respectively.

Item 6.  Exhibits and Reports on Form 8-K

         (a) Exhibits:

                  10.1     Order of the United States  Bankruptcy  Court for the
                           District  of  Delaware,  dated May 10,  2000,  in re:
                           Mariner   Post-Acute   Network,   Inc.,   a  Delaware
                           Corporation, and affiliates, Debtors.

                  10.2     Letter Agreement, dated as of June 30, 2000, amending
                           Settlement  Agreement  dated  as of March  20,  2000,
                           among  Senior  Housing   Properties   Trust,   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.

                  10.3     Interim  Management  Agreement,  dated  as of July 1,
                           2000,  among Mariner  Post-Acute  Network,  Inc., AMS
                           Properties,  Inc.,  GCI Health  Care  Centers,  Inc.,
                           SHOPCO-AZ, LLC, SHOPCO-CA, LLC, SHOPCO-COLORADO, LLC,
                           SHOPCO-WI, LLC and Five Star Quality Care, Inc.

                  10.4     Order of the United States  Bankruptcy  Court for the
                           District  of  Delaware,  dated July 7,  2000,  in re:
                           Integrated Health Services, Inc., et al., Debtors.

                  10.5     Amendment to Settlement  Agreement,  dated as of June
                           29, 2000,  among Integrated  Health  Services,  Inc.,
                           Community 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 No. 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., Quality Care of Columbus, Inc.,
                           Senior Housing  Properties  Trust,  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-


                                       11


                           MO,   LLC,   SHOPCO-NE,    LLC,    SHOPCO-WY,    LLC,
                           SNH-Nebraska,       Inc.,       SNH-Iowa,       Inc.,
                           SNH-Massachusetts, Inc., SNH-Michigan, Inc., Advisors
                           Healthcare  Group,  Inc. and Five Star Quality  Care,
                           Inc.

                  10.6     Management and Servicing Agreement,  dated as of July
                           10, 2000, among Integrated Health Services, Inc., ECA
                           Holdings, Inc., ECA Properties,  Inc., Community Care
                           of Nebraska, Inc., W.S.T. Care, Inc., Quality Care of
                           Lyons, Inc.,  Integrated Health Services at Grandview
                           Care Center,  Inc.,  Quality Care of Columbus,  Inc.,
                           Marietta/SCC,  Inc., Glenwood/SCC,  Inc., Dublin/SCC,
                           Inc.,  College  Park/SCC,  Inc., IHS  Acquisition No.
                           112,  Inc.,  IHS   Acquisition  No.  113,  Inc.,  IHS
                           Acquisition No. 175, Inc., Senior Housing  Properties
                           Trust, Five Star Quality Care, Inc., SHOPCO-COLORADO,
                           LLC, SHOPCO-CT,  LLC, SHOPCO-GA, LLC, SHOPCO-IA, LLC,
                           SHOPCO-KS,   LLC,  SHOPCO-MI,  LLC,  SHOPCO-MO,  LLC,
                           SHOPCO-NE,   LLC,   SHOPCO-WY,   LLC   and   Advisors
                           Healthcare Group, Inc.

                  10.7     Amended and  Restated  Lease  Agreement,  dated as of
                           January 1, 2000,  between HRES1  Properties Trust and
                           IHS Acquisition 135, Inc.

                  10.8     Guaranty,  dated  as of  January  1,  2000,  made  by
                           Integrated  Health  Services,  Inc. in favor of HRES1
                           Properties Trust.

                  27       Financial Data Schedule.

         (b) Reports on Form 8-K:

              Current  Report on Form 8-K,  dated July 1, 2000,  relating to (i)
              the Company's  settlements with Mariner Post-Acute Networks,  Inc.
              and its subsidiaries,  and with Integrated  Health Services,  Inc.
              and its  subsidiaries,  and (ii) the  management of certain of the
              Company's properties by Five Star Quality Care, Inc. (Item 5).


                                       12


                         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, 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 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 stated or implied 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,
implied,  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 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, 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.


                                       13


                         SENIOR HOUSING PROPERTIES TRUST

                                   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:  August 10, 2000

                                 By: /s/ Ajay Saini
                                     Ajay Saini
                                     Treasurer and Chief Financial Officer
                                     Dated:  August 10, 2000


                                       14