问题标题:
hemusthavereadthisbookyesterday用完成?hemustreadthisbookyesterday?才对吧
问题描述:
hemusthavereadthisbookyesterday用完成?
hemustreadthisbookyesterday?才对吧
冯德全回答:
hemusthavereadthisbookyesterday
musthavedone
这是用来推测的.
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