二语态
语法精讲1. 当句子的主语是动作的执行者时，谓语（vi. Vt.）的形式叫主动语态；当句子的主语是动作的承受者时，谓语(vt.)用被动语态。被动语态的结构：
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 road is being widened.
5）过去进行时：The new tool was being made.
6）过去完成时：He said that work had been finished.
7）现在完成时：The novel has been read.
2.一些特殊的被动结构：
1）情态动词的被动结构：The problem must be solved soon.
2）带非谓语的被动结构：
The room is going to be painted. I hate being made fun of.
3）短语动词的被动结构：
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, think of. etc.
②（及物）动词+副词：
bring about, carry out, find out, give up, hand in, make out, point out, put away, turn down, work out, etc.
