do not have to和unnecessary的区别~一直搞不懂do not have to和unnecessary的区别~现有急用~最好能附带着两个词对比的例句

do not have to=? You do not have to do anything You do not have to do anything! have yet to do 和have not yet to do 的区别.越详细越好.thanks a million Some things really do not have to They do not have time to study and do housework ,too.为什么不用OR 和EITHER do not have和have not有什么区别啊 do not have和have not有什么区别啊 掌握have to （不得不）和do not need to（不必要）的用法, can not have done sth和be considered to have done sth和offer to do sth 的中文意思 have to,must,do not need,needn't的区别用法和区别 enough to do和not enough to Have to and do not need to翻译 i do not have to go to school啥意思 you do not have to change yourself,to get used have decided not to do 和 have not dicided to do解释为决定不再做某事是哪个?完成时的否定必须要把NOT加在have后面吗? Do not guess I to your love,do not have doubts I to your sentiment. Do not always learn how to have,not to mention how to get to treasure and