be动词的形式和用法

1、Be动词的形式: be, is, am, are, was, were, being, been。

2、be动词的用法:后面接名词,形容词,地点副词,或短语做补足语。

3、be动词的否定,在am, is, are, was, were 后面加 not, 缩略式am not, isn't, aren't, wasn't, weren't。

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be动词的形式和用法
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