neednot和don'tneedto的区别

Question

need not和don't need to 的区别

Answer 1

need具有双重属性,既可以作情态动词也可以作普通实意动词,所以其否定形式也就有两个：
need not 符合情态动词特点,比如You need not come early on Sunday.
don't need toz符合普通实意动词特点,比如You don't need to come early on Sunday.
特别提醒：虽然need有两个属性,但是在具体应用时不可以交叉使用.必须做到一致性.比如不可以说need not to do,也不可以说don't need do