語態(tài)有兩種：主動(dòng)語態(tài)和被動(dòng)語態(tài)。主語是動(dòng)作的發(fā)出者時(shí)為主動(dòng)語態(tài);主語是動(dòng)作的接受者時(shí)為被動(dòng)語態(tài)。

注意：1)感官動(dòng)詞主動(dòng)語態(tài)的賓語補(bǔ)足語是不帶to 的不定式，變?yōu)楸粍?dòng)語態(tài)時(shí)，該不定式前要加"to".例如：

The teacher made me go out of the classroom. 老師逼我走出教室。

——> I was made to go out of the classroom (by the teacher)。

We saw him play football on the playground. 我們看見他在草場踢球。

——> He was seen to play football on the playground.

2)情態(tài)動(dòng)詞+ be +過去分詞，構(gòu)成被動(dòng)語態(tài)。例如：

Coal can be used to produce electricity for agriculture and industry. 煤可以產(chǎn)生工農(nóng)業(yè)需要的電。