肯定回答;Yes,you do.
否定回答：No,you needn't/ No ,yo don't have to.
祝你开心如意!A no ,you don,t Bno ,you shouldn't Cno ,you mustn't D no ,you can'tA,No,you don't=No,you don't have to.不，你不必了。不必：needn't；don't have to.mustn't：禁止；不许；绝对不可以。【不能表示"不必"】。