didn`t need to do 和need not to do区别

didn`t need to do 和need not to do区别 Need not to do 与 need not do 的区别 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 not to do 和don‘t need to do,哪个对? don not need to do和need not do 的区别 need to do 和 need do的区别 need to do sth和need do sth区别? need to do 和need do 的区别 Didn't need to do还有 needn't have done的区别 有没有didn't have to do ,didn't need to do need do;need to do;need doing的区别?