初中英语语法大全：动词的语态
语态有两种：主动语态和被动语态。
主语是动作的发出者为主动语态;主语是动作的接受者为被动语态。
1)若宾语补足语是不带to 的不定式，变为被动语态 时，该不定式前要加 "to"。此类动词为感官动词。
feel, hear, help, listen to, look at, make, observe, see, notice, watch
The teacher made me go out of the classroom.
--> I was made to go out of the classroom (by the teacher).
We saw him play football on the playground.
--> He was seen to play football on the playground.
2)情态动词+ be +过去分词，构成被动语态。
Coal can be used to produce electricity for agriculture and industry.
初中英语语法大全：被动表示主动
被动形式表示主动意义
be determined, be pleased, be graduated (from), be finished, be prepared (for), be occupied (in), get marries
He is graduated from a famous university.
他毕业于一所有名的大学。
注意： 表示同某人结婚，用marry sb. 或get married to sb. 都可。
He married a rich girl.
He got married to a rich girl.
初中英语语法大全：主动表示被动
主动形式表示被动意义
1)wash, clean, cook, iron, look, cut, sell, read, wear, feel, draw, write, sell, drive…
The book sells well. 这本书销路好。
This knife cuts easily. 这刀子很好用。
2)blame, let(出租), remain, keep, rent, build
I was to blame for the accident.
Much work remains.
3) 在need, require, want, worth (形容词), deserve后的动名词必须用主动形式。
The door needs repairing.= The door needs to be repaired.
This room needs cleaning. 这房间应该打扫一下。
This book is worth reading. 这本书值得一读。
4) 特殊结构：make sb. heard / understood (使别人能听见/理解自己)，have sth. done ( 要某人做某事)。