虚拟语气中had done与would have done，did与would do 的用法有何区别

如题所述

第1个回答推荐于2017-09-01

当主句与if条件句中的动作都发生在过去时,主句谓语动词就要使用had done形式,if条件句中谓语动词则要使用would have done形式。e.g.If I had worked hard,I would have passed all the exams.

当主句以及if条件句中的动作都发生在现在时,主句的谓语动词必须使用did(be动词用were),if条件句动词须使用would do形式。e.g.
If he came on time for the meeting,I would treat you to a rich meal.
If I were you,I would go with him.

当主句和if条件句的动作都发生在将来时,主句动词可以使用did,should do 或were to do形式,if条件句中动词须使用would do形式.
e.g.If you kept/should / keep were to keep your promise,you would earn more than trust.本回答被提问者采纳

第2个回答 2013-09-13

没啥区别啊

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