小学二年级英语语法之语态

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。