形式

被動(dòng)語(yǔ)態(tài)由助動(dòng)詞be加及物動(dòng)詞的過(guò)去分詞構(gòu)成，強(qiáng)調(diào)動(dòng)作是由什么人或什么東西而發(fā)出時(shí)，常用介詞“by +行為發(fā)出者”，即be+done+by+行為發(fā)出者。

被動(dòng)語(yǔ)態(tài)可用于各種時(shí)態(tài)，通過(guò)助動(dòng)詞be的變化來(lái)表示：

1、一般現(xiàn)在時(shí)的被動(dòng)語(yǔ)態(tài). am / is / are + 動(dòng)詞的過(guò)去分詞Our classroom is cleaned every day.This car is made in China.

2、一般過(guò)去式的被動(dòng)語(yǔ)態(tài): was / were + 動(dòng)詞的過(guò)去分詞His desk was cleaned just now.The station was built in 1928.

3、現(xiàn)在進(jìn)行時(shí)的被動(dòng)語(yǔ)態(tài): am / is / are + being + 動(dòng)詞的過(guò)去分詞A new factory is being built in our city now.Some trees are being cut down in the park.

4、過(guò)去進(jìn)行時(shí)的被動(dòng)語(yǔ)態(tài): was / were + being + 動(dòng)詞的過(guò)去分詞A new factory was being built in our city at that time.Some babies were being looked after by Miss Chen last year.

5、一般將來(lái)時(shí)的被動(dòng)語(yǔ)態(tài):(A) will / shall + be + 動(dòng)詞的過(guò)去分詞(B) am / is / are + going to be +動(dòng)詞的過(guò)去分詞.Some new factories will be built in our city this year.Your watch is going to be mended in an hour.

6、過(guò)去將來(lái)時(shí)的被動(dòng)語(yǔ)態(tài):(1)would / should + be + 動(dòng)詞的過(guò)去分詞(2)was / were +going to be + 動(dòng)詞的過(guò)去分詞.She said that some new factories would be built soon in our city.He thought that your watch was going to be mended after an hour.

7、現(xiàn)在完成時(shí)的被動(dòng)語(yǔ)態(tài):have / has + been + 動(dòng)詞的過(guò)去分詞Some new factories have been built in the city since last year.Your watch has been mended already.

8、過(guò)去完成時(shí)的被動(dòng)語(yǔ)態(tài):had + been + 動(dòng)詞的過(guò)去分詞He said that some new factories had been built in the city.I didn’t know that my watch had been mended .

9、含情態(tài)動(dòng)詞的被動(dòng)式：can/may/must + be + done(1)You must hand in your homework after class.Your homework must be handed in after class.(2)He can write a letter with the computer.

A letter can be written with the computer by him.

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