His work _____ have been completed; otherwise, he wouldn’t be enjoying himself on the beach.


  1. A.
    should
  2. B.
    shouldn’t
  3. C.
    can’t
  4. D.
    must
D
試題分析:考察情態(tài)動詞用法。Should have done本應(yīng)該做某事,實際上卻未做;shouldn’t have done本不應(yīng)該做某事,實際上卻做了。Can’t have done不可能做了某事;must have done一定做了某事;本句的關(guān)鍵在于otherwise后面的句意。句意:他肯定完成了他的工作,要不然,他不會在海灘上玩得那么開心的。根據(jù)句意說明這是對過去發(fā)生的事情的有把握的肯定推測。故D正確。
考點:考察情態(tài)動詞用法
點評:本題是高考必考考點,一定要牢記句型意思。must have done過去肯定做了某事。should have done 本應(yīng)該做而實際未做。can’t have done 過去不可能做了某事;shouldn’t have done 本不應(yīng)該做而實際做了。 need have done 本有必要做某事;needn’t have done 本沒有必要做某事;注意沒有 mustn’t have done的形式。
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