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nEED not hAvE DonE

must have done的否定形式是can't have done. 用must来表示肯定、猜测;用can't 来表示动作不可能发生,如: - that must be wrong. - No, it can't be wrong. 过去式举例:He walked past me without speaking. He can't have seen me. couldn'...

1.He need not have done it. 他本不需要做这件事。 2.Yet they need not have done. 然而他们没有必要这样做。 3.You need not have done it. 你本来不必做此事。 4.I quitted smokinglast month, but I need not have done so.上个月我把烟戒...

didn‘t need to do里need是普通动词,就是need本来的意思,(过去)没必要/不需要做某事 need not have done 里need是情态动词,意思是本来无必要做某事(却做了),本不该做某事 例如: He did not need to come early, so he came late. 他不需...

用对应时态的否定式就可以啦。need not have done 是指‘本不需要做却做了’,

need have done的意思是“本不需要做但却做了。。。”,此句译为“你昨天本不需要买这本书”(实际上你买了)。固定用法哦~~

need 可以做情态动词, 但用法不是 need sb do sth, 用法同其他情态动词 同时need 也可以做普通动词,就有了 need sb to do sth. 这种用法

need do sth. 中的need是情态动词,后面跟动词原形;need to do sth.中一般是实意动词, need的用法讲解,供参考: 一、作情态动词 1.need作情态动词无人称或数的变化, 后接动词原形,多用于否定句和疑问句中。如:You needn't worry.你不必担...

love, need prefer, prepare, promise, want, wish...答案:D. why not 后面接不带to 的不定式,因此选...完成式 to have done to have been done完成进行...

一、作及物动词,意为“喜欢”,后接名词或代词,表示对某一事物的兴趣或爱好。例如: I like fish and vegetables very much. Jack doesn't like his work. 二、常与would,should连用,表示“想要、愿意、希望”,语气较为客气委婉。例如: Would y...

should not have done / ought not to have done:表示过去本不应该做某事但事实上却做了。 need have done:表示过去本来有必要去做某事,但事实上没有做。 ...

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