小升初英语语法：主动与被动

     英语语态有两种：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, mak英语e, 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。

编辑推荐：

小升初英语语法：一般过去时的用法

小升初英语语法： 一般将来时

小升初英语语法：形容词与副词的比较级