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语态是动词的一种形式，表示的是主语和谓语之间的关系。英语中的语态有两种：主动语态和被动语态。
当主语是谓语的执行者时，用主动语态。当主语是谓语的承受者时，用被动语态。如：
We clean the classroom every day.
我们每天都打扫教室。
The classroom is cleaned (by us) every day.
教室每天都被(我们)打扫。
被动语态的基本构成
was
He/She/It
were
You/We/They
supported.
was
I
一般过去时
is
He/She/It
are
You/We/They
supported.
am
I
一般现在时
过去分词
be动词
主语
The cake was eaten by Daniel.
2. Nancy bought a book yesterday.
3. The little dog is looked after very well
by Simon.