(1) am/is / are+及物动词的过去分词 ,体现一般现在时的被动语态

eg.English is spoken in their country.

(2) was/were +及物动词的过去分词 ,体现一般过去时的被动语态

eg.Our school wasn’t built in 1990.

Were the trees planted by him?

(3) will /shall+ 及物动词的过去分词,体现一般将来时的被动语态

eg.A:I shall send my boy to school next September.

P:My boy will be sent to school next september.

(4) would/should +及物动词的过去分词,体现一般过去将来时的被动语态

(5) have/has +been done,体现现在完成时的被动语态

eg.A:We have studied English for nine years.

P:English has been studied for nine years by us.

(6) had + been done,体现过去完成时的被动语态

eg.A:They had produced 100 cars by the end of last year.

P:100 cars had been produced by the end of last year.

带情态动词的被动结构

其形式为：情态动词+be+动词过去式

• Can,could/ will,would/ shall,should/ may,might/ must/ ought to/ need/ have to.

• Eg.The baby can be taken good care of by the baby-sitter.

主动语态变被动语态应注意的问题

1.把主动语态变为被动语态时,应保留主动语态原时态.

Eg.She often cleans the house.

The house is often cleaned by her.

2.有些动词可以有双宾语,在用于被动结构时,有两种改法.

Eg.His mother gave him a present for his birthday.

= He was given a present by his mother for his birthday.

= A present was given to him by his mother for his birthday.

3.当“动词+宾语+宾语补足语”结构变为被动语态时,

将宾语变为被动结构中的主语,其余不动.

Eg.Someone caught the boy smoking a cigarette(香烟）

=The boy was caught smoking a cigarette.

4.在使役动词have,make,get,let以及感官动词see,watch,notice,hear

不带to的动词不定式等变为被动结构时,要加to

Eg.Someone saw a stranger walk into the building.

=A stranger was seen to walk into the building.

5.有些相当于及物动词的动词词组,

如“动词＋介词”,“动词＋副词”等,也可以用于被 动结构,但要把它们看作一个整体,不能分开.其中的介词或副词也不能省略.

Eg.The meeting is to be put off till Friday.

The homeless children will be taken good care of.

课堂练习

（一）改写句子

1.We plant trees in spring every year.

_________________ by us in spring every year.

2.She posted the letter yesterday.

____________________ by her yesterday.

3.Mr.Turner gave me a birthday present.

_______________a birthday present by Mr Turner.

4.You may hand in your homework tomorrow.

______________________________ by you tomorrow.

5.She will write a letter.

__________________________ by her.

6.Her bag cannot be found by her.

_________________ her bag.

7.Do you often hear her sing Russian songs?

_________________________Russian songs by you?

8.She doesn’t let her son swim in the river.

_______________________ in the river by her.

9.Does she often sing the song?

_____________________ by her?

10.No one has ever beaten him at tennis.

________________________ at tennis.

以上是我自己做的PPT.