I needn't study.和I don't need to study.区别是什么?I needn't study.情态动词I don't need to study.实义动词2着的区别是什么?怎么理解他不同的意思?

I needn't study.和I don't need to study.区别是什么?I needn't study.情态动词I don't need to study.实义动词2着的区别是什么?怎么理解他不同的意思? Thanks.You ______ it.I could manage it myself A.needn’t doB.needn’t have done C.mus...Thanks.You ______ it.I could manage it myself A.needn’t doB.needn’t have done C.mustn’t do D.shouldn’t have done中B和D有什么区别?Catherine,I have 请赐教 I needn't 和 I don't need的区别?可否举例说明？ I (I)can do it .I needn't your help ---Don't forget to write to me soon.---_____ A.I don't B.I won't C.I couldn't D.I needn't ----I must start at once,______ I ----No, you _____ A. mustn't; mustn't B. needn't...(选择题)A. mustn't; mustn't B. needn't; mustn't C. mustn't; needn't D. needn''t; needn't请说明为什么. May I finish the work this afternoon?No,you __ You __ finish it now请填空 A mustn*t needn*t B needn*t don*t have toC needn*t mustn*t D mustn*t mustn*t May I go out to play No you ______A.mustn't B.couldn't C needn't D.shouldn't I have to go there,____ A.don't B.haven't C.haven't to D.needn't May I borrow your book?No ,you __A 、couldn't B、 can't C、mustn't D、needn't I needn't go to work today.I'm______. needn't和don't Need 还有You'd Better的问题you'd better .hadn't you you'd better = you had better 为什么不能用didn't you I'd like = I would like那反义疑问句用什么?She _____ worry about the physics contestA.needn't toB.needsC.dosen when i was young ,i was told that i --------play matchesa.wouldn't b.needn't c.mustn't d.daren't I can do it by myself.I ____any help.I can do it by myself.I ____any help.A.don't need B.needn'tC.don't need to D.needn't to You______ help me .I can do it myself.A.need B.don't C.need't D.needn't to May I come in?No,you ___.A.mustn't B.needn't C.may not D.aren't May I talk in the class? No ,you _______A mustn't B may not C shpuldn't D needn't May I come in? No, you ___. A. mustn't B. needn't C. may not D. aren't