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。