(2)谓语动词变为由“be + 过去分词”的形式，配合时态作相应变化。
现 在 do (does) →am /is / are + done
We keep the piano in the living-room.
→The piano is kept in the living-room.
过 去 did→was / were +done
They built the bridge in 1980.
→The bridge was built in 1980.
将 来 will/shall do →will/shall + be + done
He will read the book tomorrow.
→The book will be read tomorrow.
现在完成 have/has done →have/has + been + done
We have delivered the newspaper.
→The newspapers have been delivered (by us).
过去完成 had done → hadbeen done
She had seen the film before she came here.
→The film had been seen before she came here.
将来完成 will/shall have done → will/shall have + been + done
By the end of this term we shall havefinished 80 texts.
→By the end of this term 80 texts will havebeen finished.
现在进行 am/is/are doing → am/is/are + being + done
They are drawing the picture.
→The picture is being drawn by them.</p>
过去进行 was/were doing →was/were + being + done
He was reviewing their lessons at this momentyesterday.
→Their lessons were being reviewed at thismoment yesterday.
情态动词 may may
should do → should +be + done
ought to ought to
used to used to
You must write an article on the subject.
→An article must be written on the subject.
1. Since the first space mission， many communication satellites ________.
A. was launched B. are launched C. have beenlaunched D. had been launched
2. What kind of advice ________ you？
A. has gave B. was gave C. had been given toD. has given
3. The slave ________ from morning tillnight.
A. madeto work B. was made working C. wasmade worked D. was made to work
4. The construction of the laboratory________ by the end of July.
A. must be completing B. must complete
C. must have completed D. must have beencompleted
5. Your proposal ________ by the committeesoon.
A. is discussed B. has been discussed
C. is going to be discussed D. will have beendiscussed
1. C 2. C 3. D 4. D 5. C