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nEED hAvE DonE 用法

没有need have done这种说法,只有needn’t have done (没必要做某事但做了),表责备之意,这里的need属于情态动词。这种用法的结构是情态动词+完成时态。need有两种词性, 一个是做情态动词 ,一个是实义动词。 而need to do的need是实义动词...

need have done应该是表示本应该做某事却没有做, 他的否定形式needn't have done 就是表示本没有必要做某事而做了. 例如:You needn't have stayed.意思就是 你本没有必要留下来(实际却留下来了).

因为need要表示完成时的时候直接用need to be done就可以了

need have done有需要做却没做的含义 need单单是需要做

是情态动词,表示对过去的虚拟。 例如: ----I spent the whole day finishing the composition yesterday. ----You needn't have finished it so hurriedly because it won't be due until next week. 译文: ---我昨天花了一整天完成这篇作文...

不同之处为: needn't have done表示某件事没必要做却已经做了。表示已经做了这件事。 didn't need to do指在过去某件事不必做,是否做了不清楚。 例句: needn't have done 1、We spent a hell of a lot of money that we needn't have spent. ...

didn't need to表示过去不需要做,但是也许做了,也许没做,不确定; needn't have done表示过去不需要做的事已经做了

need have done 。。。本人才疏学浅,没见过这种说法,通常是need to be done,表示需要被完成。如:All the housework needs to be done today. (今天需要完成所有家务。) must have done肯定猜测语气,表示一定已经完成了。如:He must have f...

needn't have done和didn't need to do 的不同: 1、needn't have done 表示 本不需要做某事,但是已经做了 2、didn't need to do 表示 (过去)没有必要做某事,但是到底做没做某事,应该根据语境来分析。 一、needn't have done 1、这里的 nee...

不定式的一般式是表示“将来”,you don't.have to tell me.

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