如何学习动词的语态

1、短语动词是一个整体，当用被动语态时，不可丢掉后面的介词或副词，如such a thing has never been heard of berfore

2、不及物动词或不及物动词短语，如appear, die, disappear, end, fail, happen, last , lie, remain, sit , spread, stand, break, out, come true, take place等没有被动语态

3、不能用于被动语态的及物动词或动词短语如fit,have, hold, marry, own, wish, cost, notice, succeed in等也无被动语态

4、主动形式表被动意义，如wash, clean, cook, iron, look, cut, sell,read, wear,sell等，如the book sells well.

5、被动形式表示主动意义，如be determined, be pleased, be graduated(from), be prepared for, be occupied in, get married等

6、当need, want, require, be worth后面接doing时，表示的是被动意义，例如your hair wants cutting， the floor requires washing