he doesn't come from the USA和he isn't from the USA的区别是什么?为什么不能he doesn't from ...

问题描述:

he doesn't come from the USA和he isn't from the USA的区别是什么?
为什么不能he doesn't from ...

he doesn't come from the USA.
he isn't from the USA.
这两句是同义句.be from 相当于 come from.来自
对动词表示否定,才会借助于助动词.be from 含有be动词,直接加not表示否定.