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來源：網絡資源 2023-02-18 20:11:58
形式
被動語態由助動詞be加及物動詞的過去分詞構成，強調動作是由什么人或什么東西而發出時，常用介詞“by +行為發出者”，即be+done+by+行為發出者。
被動語態可用于各種時態，通過助動詞be的變化來表示：
1、一般現在時的被動語態. am / is / are + 動詞的過去分詞Our classroom is cleaned every day.This car is made in China.
2、一般過去式的被動語態: was / were + 動詞的過去分詞His desk was cleaned just now.The station was built in 1928.
3、現在進行時的被動語態: am / is / are + being + 動詞的過去分詞A new factory is being built in our city now.Some trees are being cut down in the park.
4、過去進行時的被動語態: was / were + being + 動詞的過去分詞A new factory was being built in our city at that time.Some babies were being looked after by Miss Chen last year.
5、一般將來時的被動語態:(A) will / shall + be + 動詞的過去分詞(B) am / is / are + going to be +動詞的過去分詞.Some new factories will be built in our city this year.Your watch is going to be mended in an hour.
6、過去將來時的被動語態:(1)would / should + be + 動詞的過去分詞(2)was / were +going to be + 動詞的過去分詞.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、現在完成時的被動語態:have / has + been + 動詞的過去分詞Some new factories have been built in the city since last year.Your watch has been mended already.
8、過去完成時的被動語態:had + been + 動詞的過去分詞He said that some new factories had been built in the city.I didn’t know that my watch had been mended .
9、含情態動詞的被動式：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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