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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...

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).

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. ...

一、needn't have done的用法。 needn't have done意指没必要干某件事但多余地干了,即浪费了时间: You needn't have watered the flowers,for it is going to rain. 你本不必浇那些花,因为就要下雨了。(你浪费了时间。) You needn't have...

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...

区别解释: 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。 例句辨析: needn't have done 1、I needn't have bought al that wine-only three people came. ...

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...

一、 “must+have+done”表示对过去事情的肯定推测,译成“一定做过某事”,该结构只用于肯定句。 1. It must have rained last night, for the ground is wet. 昨晚一定下雨了,因为地面还是湿的。 2. You must have been mad to speak to the serv...

解释一 didn't need to do 过去时 意思: 没必要去做某事 (事情还未做) needn't have done 一般现在时 意思: 没必要做了某事 (事情已做好) 解释二 didn't have to 是表示 “过去这件事情没有必要做”,但是实际上可能做了,也可能没做. 例句:I...

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