初中被动语态小结

三、被动语态的用法

 (1)不知道或没有必要说明动作的执行者是谁。

例如：Some new computers were stolen last night.　一些新电脑在昨晚被盗了。(不知道电脑是谁偷的)

This bridge was founded in 1981.这座桥竣工于1981年。

 (2)强调动作的承受者，而不强调动作的执行者。

  例如：The glass was broken by Mike.玻璃杯是迈克打破的。

  This book was written by him.这本书是他写的。

　Your homework must be finished on time.你们的家庭作业必须及时完成。

四、主动语态变被动语态的方法

 (1)把主动语态的宾语变为被动语态的主语。

 (2)把谓语变成被动结构(be＋过去分词) (根据被动语态句子里的主语的人称和数，以及原来主动语态句子中动词的时态来决定be的形式)。

 (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.

He cut down a tree.

A tree was cut down by him.