题目内容

7．-He should have come to join in the thorough cleaning．
-He         ．I don't think it was his turn．（　　）
A．needn't have toB．needn't haveC．didn't have toD．doesn't need to

分析 --他本应该来参加这次大扫除．
--他没有必要．我认为没有轮到他．

解答 答案是C．本题考查情态动词的区别．A项中needn't表示"不必"；have to 表示"不得不"，其否定式don't have to 等于needn't； needn't 不与have to 连用；B项needn't have是needn't have come的省略，表示"本不必做但实际上却做了"；C项didn't have to 等于didn't need to do表示"过去没有必要做事实上也没有做"；D项doesn't need to do 表示"现在或将来没有必要做"；根据句意可知，他没有来参加大扫除，并且回答的人认为也没有必要来，所以答案是C．

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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