题目内容

7.He _______ have finished his work; otherwise,he wouldn't be enjoying himself by the seaside.(  )
A.shouldB.mustC.needD.can

分析 他肯定已经完成了他的工作;否则他不会再海边逍遥自在.

解答 答案是B.本题考查"情态动词+have done"的结构.should have done是虚拟语气,表示"本应做但事实上却没有做";must have done表示推测,表示"肯定已经…";need have done只能用在否定句中表示"本不必做…,实际上却做了";can have done 用在否定句和疑问句中,表示"可能已经…吗?"或"不可能已经…".根据句意可知,他现在在海边,故判断他"肯定已经"完成工作,由此判断答案选择B.

点评 要在正确理解情态动词的基本含义的基础上,整体理解语境中的情感态度,做出合理的判断.

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