Be nice to your friends when you are at school.是省略句吗?主句为什么没有主语
问题描述：
Be nice to your friends when you are at school.是省略句吗?主句为什么没有主语
答
(You please) be nice to your friends when you are at school.(You (主语)please（礼貌用词）) be（系动词） nice（表语） to your friends （状语）when you are at school.（这里是时间状语从句部分,when是连...