何時運(yùn)用被動語態(tài)：

    （1 ）強(qiáng)調(diào)動作的接受者：America was discovered by Columbus. （2 ）

    不知誰是動作的執(zhí)行者：You are wanted on the phone.（3 ）作客觀說明
：It is said that the meeting has been put off. （經(jīng)典句型）

    主動變被動的基本方法：（說起來容易，掌握起來需要用心！）

    （1 ）主動語態(tài)中的賓語變?yōu)楸粍诱Z態(tài)的主語。

    （2 ）謂語動詞變?yōu)橛?ldquo;be +過去分詞”的形式，配合時態(tài)作相應(yīng)變化。

    （3 ）主動語態(tài)主語置于介詞 by 之后，如無必需，則省略。

    （4 ）不及物動詞沒有被動語態(tài)。

    現(xiàn)在 do （does）→am / is / are + done We keep the piano in the living-room.
→The piano is kept in the living-room.

    過去 did→was / were + done They built the bridge in 1980.→The bridge
was built in 1980.

    將來 will/shall do→ will/shall + be + done He will read the book
tomorrow. →The book will be read tomorrow.

    現(xiàn)在完成 have/has done→ have/has + been + done We have delivered
the newspaper.→The newspapers have been delivered（by us ）。

    過去完成 had done → had been done She had seen the film before she
came here.→The film had been seen before she came here.

    將來完成 will/shall have done → will/shall have + been + done By
the end of this term we shall have finished 80 texts. →By the end of
this term 80 texts will have been finished.

    現(xiàn)在進(jìn)行 am/is/are doing→ am/is/are + being + done They are drawing
the picture.→The picture is being drawn by them.< /p>

    過去進(jìn)行 was/were doing → was/were + being + done He was reviewing
their lessons at this moment yesterday. →Their lessons were being reviewed
at this moment yesterday.

    情態(tài)動詞 may may can can must must 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.

    測試精編

    1. Since the first space mission， many communication satellites ________.
A. was launched B. are launched C. have been launched D. had been launched

    2. What kind of advice ________ you ？

    A. has gave B. was gave C. had been given to D. has given

    3. The slave ________ from morning till night. A. madeto work B. was
made working C. was made 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 been completed

    5. Your proposal ________ by the committee soon. A. is discussed B.
has been discussed C. is going to be discussed D. will have been discussed

    （后設(shè)答案，大家不要偷看哦~ （*^__^*）嘻嘻……）

    KEYS

    1. C 2. C 3. D 4. D 5. C