二、被动语态的构成

时态 形式 举例 一般

现在时 is/am/are done New problems are dealt with every day.

每天都有新的问题被处理。 一般

过去时 was/were done These letters were written in 1990.

这些信是1990年写的。 一般

将来时 will be

done Many trees will be planted next year.

明年将种许多树。 过去

将来时 would be done The plan would be carried out.

计划将被执行。 现在

进行时 is/am/are being done The question is being discussed at present.

问题现在正在讨论之中。 过去

进行时 was/were being done At that time he was being shown how to swim.

那时他正在被教如何游泳。 现在

完成时 has/have been done Both the towers have already been repaired.

两个塔已被修复完毕。 过去

完成时 had been

done He said that some bridges had been washed away.

他说一些桥已被冲走。 　　三、非谓语动词的被动语态

　　1．不定式的被动语态分为一般式和完成式，即：to be done和to have been done。

　　不定式的一般式表示的动作与主句谓语动词表示的动作同时(几乎同时)发生，或是发生在它之后。不定式的完成式表示的动作发生在谓语动词之前。

　　The new play to be put on tonight will be very interesting.

　　今晚要上演的新剧将十分有趣。

　　The press conference is to be held tomorrow.

　　新闻发布会明天举行。

　　The room seems to have been tidied up already.

这个房间似乎已经整理过了。