为什么不选A18.He ______ you more help,even though he was very busy.A.may give B.may have given C.might give D.might have given

为什么不选A18.He ______ you more help,even though he was very busy.A.may give B.may have given C.might give D.might have given
为什么不选A
18.He ______ you more help,even though he was very busy.
A.may give B.may have given C.might give D.might have given

为什么不选A18.He ______ you more help,even though he was very busy.A.may give B.may have given C.might give D.might have given
选D
理由 句子考察隐含条件的虚拟语气 是对过去情况的虚拟 故应采用might+ have done 结构.
供参考.

时态问题，AB不选

时态问题 时态问题

may/might have done 都可以表示对过去的事情进行肯定的推测，这里表达的是与过去事实相反的虚拟语气，只能用might+ have done.
这句话意思是“即使他很忙，他也本可以帮助你的”(而事实上他没帮你。)
又如：You may have noticed something while you were doing this task.
He ma...

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may/might have done 都可以表示对过去的事情进行肯定的推测，这里表达的是与过去事实相反的虚拟语气，只能用might+ have done.
这句话意思是“即使他很忙，他也本可以帮助你的”(而事实上他没帮你。)
又如：You may have noticed something while you were doing this task.
He may /might not have received the letter.
但是，might have done还可以意为“推测过去有可能发生但已确知并未发生的事情”。may have done 不能用于此种含义。

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