don't be 与be not 有什么区别呢?be 有自己否定形式,为什么还要用don't 来修饰呢?

don't be 与be not 有什么区别呢?be 有自己否定形式,为什么还要用don't 来修饰呢? don't be和be not的区别,分别用在什么地方?祈使句的否定用don't be还是be not? don't be 后面可以接被动语态done么 don't be 和are not有啥区别 Don't be late.为什么用''be'' don't be forget与don't forget之间有何区别 don't be careful和be not careful的区别 don't be sad/not be sad区别? 动名词和名词有什么区别啊 Don't be afraid of losing .Don't be afraid of l seem to be的否定形式是seem not to be还是don't seem to be Don't be so stingy 这里为什么用DON'T 为什么不是IS NOT no don't not 在否定是有什么区别` 英语语法求解Don't worry about_____fat这里面为什么要加个being呢?这里面为什么还要加一个be