初三英语知识点之主动语态变为被动语态

英语知识点1)主语+谓语动词+宾语

将主动语态的宾语变为被动语态的主语。

(主动)We bought a book yesterday.

(被动)The book was bought yesterday.

2)主语+谓语动词+间接宾语+直接宾语

将主动语态中一个宾语变为被动语态的主语。多数情况下将间接宾语变为主语。如果直接宾语变为主语时，间接宾语前要加介词to / for。

(主动)He showed me a book yesterday.

(被动)I was showed a book yesterday.

(被动)The book was showed to me yesterday.

3)主语+谓语动词+复合宾语

含有一个由宾语加宾语补足语构成的复合宾语，变为被动语态时，将主动语态的宾语变为被动语态的主语，宾语补足语保留不变，成为主语补足语。

(主动)I found him a good pupil. (宾语补足语)

(被动)He was found a good pupil. (主语补足语)

4)短语动词变为被动语态

有些短语动词相当于一个及物动词，其后可以接宾语，因此它们也有被动语态，但短语动词是不可分割的整体，变为被动语态时不可去掉其后面的介词或副词。

(主动)We should look after the patients very well.

(被动)The patients should be looked after very well by us.

5)宾语从句变为被动语态

若主动语态中是宾语从句，变为被动语态时常用it作形式主语，而把真正的主语放在后面。

It’s said that he passed the exam.

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