You need to wear warm clothes,_______?

题目

You need to wear warm clothes,_______?
反义疑问句为什么是 don't you?
不是needn't you

答案

这里 need to 有了to need就不是情态动词了,所以反义疑问句是 don't you
如果you needn't wear warm close,need you?
need做情态动词一般出现在否定疑问句.