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必修2《Learning about Language》最新教案优质课下载
主动语态： 主动语态表示主语是动作的 _____。My father wrote the book.
被动语态：被动语态表示主语是动作的 _______。The book was written by my father.
一般说来，只有需要动作对象的及物动词才有被动语态。
二．被动语态构成：be +及物动词的过去分词be+done
Change these sentences into passive voice.
1. They make shoes in that factory.
2. They bought ten computers last term．
3. Ling Feng can take good care of Amy ．
4. They will finish the work in ten days.
5. Some workers are painting the rooms now.
6. We have made twenty more keys．
7. I was doing my homework at 8:00 last night
.三．被动动态的使用：
(1)不知道 或没必要说出 动作的执行者时，用被动语态。
The old bridge was built many years ago.这座古桥是很多年前建造的。
He was elected chairman. 他被选为主席。
(2)强调动作的承受者，此时动作的执行者由“by+动作的执行者”跟在be +done 后面，也可省略。
This good was asked by the monitor.
四．主动变被动的方法：
1.被动句的主语：将主动句的宾语变成被动句的主语
2.被动句的谓语：将主动句的谓语动词改为“be+done”
3.被动句的宾语：将主动句的主语前加by 放在谓语动词之后。
如：they held a meeting yesterday. A meeting was held (by them)yesterday.
The baby is taken good care of by them.
五：各个时态的被动语态