怎么选？英语

if you __at school,you___a college student now.Ahad studied hard,would have beenBshould have studied hars,should have beenChad studied hard,would beDwould study hard,must have been

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C had studied hard,would be虚拟语气中间有：if从句和主句所表示的假象情况时间不一致，要作相应的调整这句句子就是如此 ，前半句是与过去事实相反，后半句是与现在事实相反（这里有个很明显的now）现在先给你三种情况：1。 同现在事实相反if条件从句：动词过去时（be--were）主句：should( would) +动词原形例如： If they were here, they would help you。2。过去事实相反if条件从句: had+过去分词主句: should(would) have+ 过去分词If she had worked harder, she would have succeeded。3。对将来的假想条件从句:should/were to+动词原型主句: should/would + 动词原形If you succeeded, everything would be all right。根据上述的规律：前半句是与过去事实相反，故用had+过去分词--had studied hard后半句与现在事实相反，故用would+动词原型--would be 　　。

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c

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我觉得选c比较好

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选A

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我觉得选D

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选C，这里表示虚拟。If从句和主句所表示的假象情况时间不一致，需要作相应的调整。前半句是与过去事实相反，后半句是与现在事实相反。因此选C。

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Ahad studied hard,would have been

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选A

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我觉得是a

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选A。“如果你上学时努力学习，现在就已经是一个大学生了。”此题用到if引导的虚拟语气，和现在事实相反，"have"用过去时"had",表“已经”，然后排除B,D(语义错），又表“现在已是一大学生”，故D.