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shoulD/CoulD/must/might hAvE DonE用法?

may/might have done有两个意思: 本来可以干......; 2. 推测过去所发生的事情。例如: You come late again. You may/might have get up early.你又迟到了,你本来可以早一点起床。 He may/might have stayed up last night.昨晚他可能熬夜了。

一、“would+have+done”虚拟语气,表示对过去事情的假设,意思是“本来会做”。 1. I would have told you all about the boy's story, but you didn't ask me. 我本来会告诉你这个小男孩的故事,但是你没有问我。 2. Without your help, I wouldn'...

could have done本来能够做什么,事实上没做 should have done本来应该做 would have done将来可能做 might have done可能做了 1. 很可惜你没做那件事,事实上你能够做的,所以选C 2. might as well 做什么更好,既然我无事可做,还不如跟着你好...

情态动词所表达的可能性程度:must/can't  should/shouldn't  might/may (not) 另外两个"类情态词的形式:"need/needn't; have to/don't have to  最自然的虚拟状态:由should/would+原型时态(不含时间只含状态) 本质...

情态动词加have done都是对过去事情的推测,区别只在于情态动词的不同 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...

情态动词有can (could), may (might), must, have to, shall (should, will (would), dare (dared), need (needed), ought to等。 情态动词无人称和数的变化;不能单独使用,必须与其后的动词原形构成谓语 一、 can, could 1) 表示能力(体力、...

情态动词有can (could), may (might), must, have to, shall (should, will (would), dare (dared), need (needed), ought to等。 情态动词无人称和数的变化;不能单独使用,必须与其后的动词原形构成谓语 一、 can, could 1) 表示能力(体力、...

might用于肯定句表示较小的可能性,在这句话中could是can的过去式(因为wish要用虚拟)表示能够、可以。

要结合原形词义来理解 Can: 能…… Will:将/会…… Shall:应/应该…… May:也许…… 肯定成份依次减弱,may是最不确定的语气。在虚拟语气里也是一样。 Could have done: 本来能…… Would have done:本来会…… Should have done:本来应该…… Might have...

2. may / might have done may / might have done 表示“过去可能做了某事”。may 比 might 表示的可能性在说话人看来稍大些。may/might not have done表示“过去可能没有做某事。”例如: I can't find my keys. I may / might have left them at t...

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