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虛擬語氣中間有：if從句和主句所表示的假象情況時間不一致，要作相應的調整這句句子就是如此 ，前半句是與過去事實相反，后半句是與現在事實相反（這里有個很明顯的now）現在先給你三種情況：1。 同現在事實相反if條件從句：動詞過去時（be--were）主句：should( would) +動詞原形例如： If they were here, they would help you。2。過去事實相反if條件從句: had+過去分詞主句: should(would) have+ 過去分詞If she had worked harder, she would have succeeded。3。對將來的假想條件從句:should/were to+動詞原型主句: should/would + 動詞原形If you succeeded, everything would be all right。根據上述的規律：前半句是與過去事實相反，故用had+過去分詞--had studied hard后半句與現在事實相反，故用would+動詞原型--would be 　　。

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c

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我覺得選c比較好

熱心網友

選A

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我覺得選D

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選C，這里表示虛擬。If從句和主句所表示的假象情況時間不一致，需要作相應的調整。前半句是與過去事實相反，后半句是與現在事實相反。因此選C。

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Ahad studied hard,would have been

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選A

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我覺得是a

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選A?！叭绻闵蠈W時努力學習，現在就已經是一個大學生了。”此題用到if引導的虛擬語氣，和現在事實相反，"have"用過去時"had",表“已經”，然后排除B,D(語義錯），又表“現在已是一大學生”，故D.