'You needn't have said that,' my wife answered.为什么need 后面要加have呢

Do you have to buy this hat?No,i needn't necessary为什么填needn't Do you have to...可以用No,I needn't. You ___to the meeting if you have no time1.needn't to come2.don't need coming3.needn't come You-------miss the lesson ,though we --------------have it on Thursday.A mustn't;needn't B needn't;mustn't C mustn't;mustn't D needn't;needn't You _____.The school sports meeting has been put off.A.needn't have com B.needn't com no you don't have to 和no you needn't哪个对 You_all the trouble had you know she has not there.A.mustn't take B.needn't take C.mustn't have taken D.needn't have taken 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 'You needn't have said that,' my wife answered.为什么need 后面要加have呢 You needn't i______ yourself .I have heard of you for a long time. No,you needn't (to).Must I make a reservation?No,you needn't )或No,don't have to.请问No,you needn't 后面有没有(to)啊,为什么呢? That must have cost you much money,___it?A.mustn't B.haven't C.needn't D.didn't There was a lot of time left,you needn't have hurried.中后面一句为什么不是you needn't hurry,而要用 You _____ again, but since you are here, i think we should let you have another tryA.needn't comeB.shouldn't comeC.needn't have comeD.couldn't have come选哪个?为什么? You needn‘t have come in person. 你当时不必亲自来的为何用完成式 请用 You needn't have said that.造一个句子,麻烦加上意思! time,have,money,so,you,at,much,that,needn't,given,him连词成句 You needn't have given the car a wash.什么结构．