摘要：2．表示“本来应该或可以做但没有做某事 .含有轻微的责备口吻或遗憾. You might have given him more help, though you were busy. 你本来应该给他更多的帮助.虽然你很忙. The proposal might have been refused. 这个建议本该拒绝的. B． cancould have done

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