能否解释一下musn't,needn't ,don't have to,can't ,couldn't的区别?May和might的区别?简略扼要要期末考了,感激不尽………………

能否解释一下musn't,needn't ,don't have to,can't ,couldn't的区别?May和might的区别?简略扼要要期末考了,感激不尽……………… musn't和needn't在用法上有什么区别 I sent an MP4 to Alice by mail just now.You___so.She is coming tomorrowA.needn't doB.needn't have doneC.musn't do D.musn't have done You must have seen him off yesterday,A.haven't you B didn't you C.musn't you D needn't you答案选 This()be a woman'coat.It() be a man'sA needn't ; canB can't ; mustC may not ; shouldD musn;t ;can't Must he come to receive the prize himself?No,he__A.musn'tB.needn'tC.can'tD.shouldn't musn‘t和 don't 的用法 Mr.Li tells us children（ ） play football on the street. It's too dangerous.A can't B musn't C may not D needn't you___play with fire.Tom.It's dangerousA.needn't B.may not C.musn't D.wouldn't应该选C吧! The Smiths went to the country for the weekend as they___to the officeA needn't have goneB musn't goC may not goD didn't have to go mustn't needn't must的回答什么时候用musn't They found there wasn't anyone at the entrance so they [ ] proof of their ages .A,didn't need to show B,needn't have shown C,couldn't show D,musn't shown Must wu do shomthing to keep our city clean?_______ a.yes we need b no you needn'tc.no you musn't d.yes of couse Must we hand in our homework now?No,you needn't.解释一下为什么要用needn't. 单项选择 I didn'tgo to work today you ____- it is sunday A didn't need to B musn't haveC can't have D needn't have It's said that there are plenty of hotels in that town.There--be any difficulty for you to find oneA.wouldn't B.musn't C.shouldn't D.needn't It's said that there are plenty of hotels in that town.There--be any difficulty for you to find oneA.wouldn't B.musn't C.shouldn't D.needn't 为什么A错C对