英语：直击2010年之《高考优学》 语法专题——动词语态

1. 被动语态的时态。动词的被动语态由动词be加上过去分词构成，时态通过be表现出来。

　　①A library with five thousand books is offered to the nation as a gift.

　　一所藏书五千册的图书馆作为礼物被送与国家。

　　②The sports meet will be put off because of the bad weather.

　　因为糟糕的天气运动会将被延期。

　　③ When the firefighters arrived, the big fire had been put out.

　　当消防员赶到时，大火已经被扑灭。