问题描述：
can have done和could have done的问题,
Thank you for all your hard work last week.I don't think we _______ it without you.
A can have managed B could have managed
有人说这是虚拟语气,那是选B.
更多的人说这是推测语气,A和B都可以表式对last week的推测.为何B对A错?而且后半句的时态不是过去时,又没表示委婉语气,为何用could?
Thank you for all your hard work last week.I don't think we _______ it without you.
A can have managed B could have managed
有人说这是虚拟语气,那是选B.
更多的人说这是推测语气,A和B都可以表式对last week的推测.为何B对A错?而且后半句的时态不是过去时,又没表示委婉语气,为何用could?
问题解答：
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