英语的语态分主动语态和被动语态两种。主动语态的主语是动作的执行者；被动语态的主语是动作的承受者。
eg. We use a knife for cutting (主动句).
A knife is used for cutting (被动句)。
一、构成：be + 过去分词
eg. 1)The work is finished by him.
2)Chinese is spoken by people in China.
二、被动语态的时态
1.一般现在时：am/ is/ are + 过去分词
eg. English is spoken by Englishmen.
