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23.[1994全国] I didn't see your sister at the meeting. If she ______, she would have met my brother.

A. has come

B. did come

C. came

D. had come

 

答案:D
提示:

题目考察if连接的条件句中的虚拟语气结构:

表示未来实现的可能性极小, if从句用“should / were to + do”,主句中“should / would / could / might to do”

例如:If I should / were to so the experiment, I would do it some other way.

表示与现在事实相反,if从句用过去式,主句用“should / would / could / might + to do”

例如:If I had a bike, I would lend it to you.

表示与过去事实相反,if从句用过去完成式,主句用“should / would / could / might + to have done”

例如:If he had been here, he would have helped you.

 


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