2018年中考英语复习之被动语态知识讲解(3)

　　（3）把主动语态中的主语放在介词by之后作宾语，将主格改为宾格。例如：

　　All the people laughed at him.

　　He was laughed at by all people.

　　They make the bikes in the factory.

　　The bikes are made?by them?in the factory.

　　歌诀是：宾变主，主变宾，by短语后面跟。

　　谓语动词变被动，be后“过分”来使用。

　　五、含有情态动词的被动语态

　　含有情态动词的主动句变成被动句时，由“情态动词＋be＋过去分词”构成，原来带to的情态动词变成被动语态后“to”仍要保留。

　　歌诀是：情态动词变动，情态加be加“过分”，原来带to要保留。例如：

　　We can repair this watch in two days.

　　This watch can be repaired in two days.

　　You ought to take it away.

　　It ought to be taken away.

　　They should do it at once.

　　It should be done at once.

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