情态动词有过去式吗 情态动词有没有过去式

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Could you do me a favor?
Could you give me a cup of coffee?
Would you like some coffee?

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\u6709\uff0c\u60c5\u6001\u52a8\u8bcd\u65e0\u4eba\u79f0\u548c\u6570\u7684\u53d8\u5316, \u60c5\u6001\u52a8\u8bcd\u540e\u9762\u8ddf\u7684\u52a8\u8bcd\u9700\u7528\u539f\u5f62,\u5426\u5b9a\u5f0f\u6784\u6210\u662f\u5728\u60c5\u6001\u52a8\u8bcd\u540e\u9762\u52a0 "not"\u3002 \u4e2a\u522b\u60c5\u6001\u52a8\u8bcd\u6709\u73b0\u5728\u5f0f\u548c\u8fc7\u53bb\u5f0f\u4e24\u79cd\u5f62\u5f0f, \u8fc7\u53bb\u5f0f\u7528\u6765\u8868\u8fbe\u66f4\u52a0\u5ba2\u6c14, \u59d4\u5a49\u7684\u8bed\u6c14, \u65f6\u6001\u6027\u4e0d\u5f3a, \u53ef\u7528\u4e8e\u8fc7\u53bb\uff0c\u73b0\u5728\u6216\u5c06\u6765\u3002

说明:引用此文请注明出处,并务请保留后面的有效链接地址,谢谢! 有网友问:英语的?回答如下:▲有些情态动词有过去式,有些没有。比如can的过去式为could,may的过去式为might,will的过去式为would,等等。比较:He can finish the work in time. 他可以按时完成工作。He said that he could finish the work in time. 他说他可以按时完成工作。注意,情态动词的过去式有时可能并不表示过去,而只是表示一种特定的语气(如使委婉等)。如:Might I come in? 我可以进来吗?(比用May I…更委婉)He couldn’t be right. 他不可能是对的。(比用can’t…更委婉)▲从形式上看,should是shall的过去式,但它本身通常当作现在式用。如:You should ask for the bill. 你应该要账单。We should take good care of the children. 我们应该好好照看这些孩子。▲有些情态动词通常没有过去式,如 must, need, ought to等。比较:He must leave today. 他必须今天离开。The boss said that he must leave today. 老板说他必须今天离开。不过,must的过去式有时可用had to来代替。如:The boss said that he had to leave today. 老板说他必须今天离开。▲dare用作情态动词时可以有过去式,但通常直接用原形代替。如:No one dared speak of it. 没人敢谈及此事。Mother dare(d) not tell father she’d given away his old jacket. 母亲不敢告诉父亲她把他的旧上衣送人了。▲值得一提的是,尽管有的情态动词可以有过去式,但并不是所有的过去情况都可以用过去式来表示的,比如对过去情况的推测就不能直接用“情态动词的过去式+动词原形”来表示,则应使用“情态动词+动词完成式”。如:他不可能就已经离开回家了。

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