not to do sth的用法

题目

not to do sth的用法
为什么在 my mother tells me -------[not laugh]at others.要用no to laugh

答案

tell告诉,是动词,如果后面在跟动词要用动词不定式
tell sb. to do sth.告诉某人做某事
否定： tell sb. not to do sth.
所以要用： My mother tells me not to laugh at others.我母亲告诉我别嘲笑他人.