Don't be late.为什么用''be''

问题描述:

Don't be late.为什么用''be''

do not后面必须跟动词原形,late是形容词, be+late构成系表结构

I am late
be动词+adj.组成系表结构

主要是前面的助词do/don't,因为助词后面加的是动词的原是,而be动词的原形就是be

助动词后面的所有动词都要变成原形,do就是助动词,因此后面的be 动词就用原形“be”。

late 是形容词咯.形容词前面肯定加动词.所以就BE LATE咯

late是形容词,Don't后面要加动词原形

late是形容词,前面学要加 is 或者 are之类的系动词
又由于 don‘t 后面一定要跟动词的原形.而is 和are的原形就是be
所以就是be late

anything else you would like to use apart from BE?
late is an adj, so you have to link that with be, and apparently you can't use am , is or are, right?