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,listento,lookat,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 agri culture and industry。

　　总结：希望大家能够认真阅读这篇小学四年级英语语法辅导：主动与被动，以便在英语学习上取得优异的成绩。