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英语
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Bob would have helped us yesterday ,but he____A.was busy B.is busy C.had been busy D.will be
答案是a,为什么不能选c呢?
人气:136 ℃ 时间:2019-08-18 21:02:33
解答
本题涉及到九年级的一个重要无法点《虚拟语气》表示对过去发生事情的推测,主句若用过去将来完成时(would have/has v.p.p),从句则使用过去时.这是我的解释,
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