2. 外语
  3. We didn’t finish the work in time. You ______ us since you were there.

We didn’t finish the work in time. You ______ us since you were there.

admin2008-10-10  28
问题 We didn’t finish the work in time. You ______ us since you were there.
选项 A、might help
B、should help
C、could have helped
D、must have helped
答案C
解析 本题考查情态动词。不同的情态动词后面接不定式的完成式可以表示不同的意义。could have done表示本来能做而实际没做，有时用来提出委婉的批评和表示后悔，也可以表示推测过去的动作很可能已经发生了；should have done表示对已发生事情表示不满，本应该做但却没做；must have done推测过去某事一定发生了；might have done表示过去某事也许发生了。
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