被动语态

何时使用被动语态

1. 不知道或没有必要指明动作的发出者

2. 出于表达的习惯

3. 强调动作的承受或被执行

4. 动作的执行者有较长的修饰语 1. Many buildings are built in our town.

2. Yaoming was born in China.

3. He was taken to hospital immediately.

4. He was brought up by a man who was kind and has great expectation 主动语态变成被动语态的方法 原主动语态的宾语变成被动语态的主语，谓语部分主动变被动，原主动语态的主语变成介词by后的宾语 （主语）He teaches English(宾语) in this school.

→English(主语) is taught by him （宾语）in this school.

A动词的被动结构及用法

动词的八种时态主动变被动 主动 被动 1. He writes novels every day.

2. He wrote novels when he was young.

3. He is writing a novel now.

4. He was writing a novel when I came in.

5. He will write many novels when he grows up.

6. He has written many novels since then.

7. He had written many novels before he went to university.

8. He promised that he would write more novels. 1. Novels are written (by him) every day.

2. Novels were written (by him) when he was young.

3. A novel is being written (by him) now.

4. A novel was being written (by him) when I came in.

5. Many novels will be written when he grows up.

6. Many novels have been written by him since then.

7. Many novels had been written by him before he went to university.

8. More novels would be written by him as he promised.

B 情态动词的被动结构