語態(tài)有兩種：主動語態(tài)和被動語態(tài)。主語是動作的發(fā)出者時為主動語態(tài)；主語是動作的接受者時為被動語態(tài)。
注意：1）感官動詞主動語態(tài)的賓語補足語是不帶to 的不定式，變?yōu)楸粍诱Z態(tài)時，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)動詞+ be +過去分詞，構成被動語態(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。
注意：1）感官動詞主動語態(tài)的賓語補足語是不帶to 的不定式，變?yōu)楸粍诱Z態(tài)時，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)動詞+ be +過去分詞，構成被動語態(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。