1．何時運用被動語態(tài)：
（1）強調(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）
2．主動變被動的基本方法：（說起來容易，掌握起來需要用心?。?BR> （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)橛伞癰e 過去分詞”的形式，配合時態(tài)作相應變化。
（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 shall shall
will do → will be done
He will read the book tomorrow.
→The book will be read tomorrow.
現(xiàn)在完成 have have
has done → 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 shall shall
will have done → will 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)在進行 am am
is doing → is being done
are are
They are drawing the picture.
→The picture is being drawn by them.
過去進行 was doing → was being done
were were
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.
（1）強調(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）
2．主動變被動的基本方法：（說起來容易，掌握起來需要用心?。?BR> （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)橛伞癰e 過去分詞”的形式，配合時態(tài)作相應變化。
（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 shall shall
will do → will be done
He will read the book tomorrow.
→The book will be read tomorrow.
現(xiàn)在完成 have have
has done → 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 shall shall
will have done → will 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)在進行 am am
is doing → is being done
are are
They are drawing the picture.
→The picture is being drawn by them.
過去進行 was doing → was being done
were were
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.