在英语语法中,什么是被动语态
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如果主语是动作的承受者,或者是说动作不是由主语而是由其他人完成的,则用被动语态.主动语态→被动语态:

1、找到该句宾语(必须是在谓语动词后的),将它提到句子开头.

2、用被动语态结构be+Vt过去分词构成句子.

3、把原句的主语用by构成的介词短语带出,也可不加.

eg:I finished my homework yesterday.

→My homework was finished (by me) yesterday.

特殊形式:

1、部分Vi加上适当介词可当作Vt构成被动语态.

eg:Parents look after their children carefully.

→Children were looked after (by parents) carefully.

2、联系动词没有被动语态.eg:The water feels warm.

3、在主动语态中一些省略to的动词不定式改为被动语态时需加上to.

eg:Teachers often make him stand outside.

→He is often made to stand outside (by teachers).

4、have、let等动词无被动语态.

必要时,have可改为held,let sb to do sth可改为be allowed to do sth (被允许做某事).

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