什么是be动词?be动词怎么用?dodoes的用法!什么时候用do,什么时候用does．

题目

什么是be动词?be动词怎么用?do\does的用法!什么时候用do,什么时候用does．
Tom --(have\has) an eraser.
___they have a TV?
——Tom ___ a book?
____Mary and Tom ____ a pencil?
快!快!快!快!快!快!

答案

be动词的用法 be [bi:] vi 现在时 I am,you are,he is,we are,you are,they are （缩略式 I'm,you're,he's,we're,you're,they're）,（否定缩略式 I'm not,isn't,aren't）,过去时 I was,you were,he was,we were,you ...