need do与need to do区别 needn't do与don't need to do区别

don't need to do 与needn't do 有什么区别? needn't do sth与don't need to do可以通用吗? didn't need to do 与needn't have done 的区别和相同点 have to,must,do not need,needn't的区别 need to do sth,need do sth.needn`t do sth和don`t need有什么不同! Need not to do 与 need not do 的区别 don't have to do sth 是否等于don't need to do sth 和needn't do st Didn't need to do还有 needn't have done的区别 need do;need to do;need doing的区别? 英语语法don't have to 与 don't need to的区别和用法don't need to和 needn' didn`t need to do 和need not to do区别 need doing need to do 区别