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--How dangerous it was !
---Yes, but for the passer-by’s quick action,the girl _____ .
A.had been drownedB.might be drowned
C.would have been drownedD.must have been drowned
C

试题分析:考查情态动词用在虚拟语气。本题的条件句的意思是通过介词but for要不是…;如果没有…;句意:—真是太危险了!—是的。要不是过路人的迅速行动,这个女孩子就会被淹死了。根据句意说明是对过去情况的虚拟,故使用“情态动词+have done”的形式。D项表示对过去情况的推测,而不是虚拟。故C正确。
点评:情态动词表推测注意以下解题步骤:
(1) 认真审题,结合所给出的语境,正确把握说话者的语气、情感、态度、观点等。
(2) 认真思考所给选项中情态动词的基本特征和用法,并结合语境推敲答案。
(3) 要注意把握时间概念。
情态动词无论是表达“推测和可能性”,还是表达“虚拟”这一概念,只要是对过去已经发生的事情进行描述,一律用“情态动词+have done”这一结构;对现在或将来的事情进行描述,用“情态动词+动词或系动词原形”。
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