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20.[1993全国]If he ________ , he ________ that food.

Luckily he was sent to the hospital immediately.

A. was warned; would not take

B. had been warned; would not have taken

C. would be warned; had not taken         

D. would have been warned; had not taken

 

答案:B
提示:

题目考察if连接的条件句中的虚拟语气结构:

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.

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.

(3)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.

 


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