被动语态9种形式

1. 当句子的主语是动作的执行者时，谓语的形式是主动语态。当句子的主语是动作的承受者时，谓语要用被动语态。被动语态由助动词be+过去分词构成，时态通过be表现出来。例如：
1）一般现在时：You are required to do this.
2）一般过去时：The story was told by her.
3）一般将来时：The problem will be discussed tomorrow.
4）现在进行时：The question is being discussed in the meeting room.
5）过去进行时：The new road was being made.

6）现在完成时：The novel has been read.

7）过去完成时：He said that the work had been finished.

8) 过去将来时：He said that the trees would be planted soon.

2. 一些特殊的被动结构

1）带情态动词的被动结构：

The problem must be solved soon.

2）带不定式的被动结构：

The homework needs to be done with care.

3）短语动词的被动结构：

例1）The baby is looked after carefully.

用于这类被动结构的短语动词要把它们作为整体看待。这类结构有以下几种：

①（不及物）动词+介词：agree to, ask for, call for, laugh at, listen to, look after, operate on, send for, talk about, th