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答案为B。由于trees与blow down之间为被动关系，故要用过去分词。blown down in the storm在此用作定语，修饰the trees，相当于定语从句which were blown down in the storm。 (2) To learn English well, we should find opportunities to hear English _________ as much as we can. (江苏卷) A. speak B. speaking C. spoken D. to speak 答案为C。由于English与speak之间为被动关系，故要用过去分词。 (3) We finished the run in less than half the time _________. (江西卷) A. allowing B. to allow C. allowed D. allows 答案为C。由于time与allow之间为被动关系，故要用过去分词。in the time allowed意为“在规定的时间内”。 二、利用动作的先后关系 动作的先后关系在选项中的直接体现为一般式还是完成式。一般说来，当非谓语动词所表示的动作发生在谓语动词所表示的动作之前时，非谓语动词原则上要用完成式。 1. 涉及不定式的动作先后关系 Leonardo da Vinci(1452-1519) _________ birds kept in cages in order to have the pleasure of setting them free. (重庆卷) A. is said to be buying B. is said to have bought C. had said to buy D. has said to have bought 答案为B。“be said+不定式”是英语中一个很有用的结构，其意为“据说”。其中的不定式是用一般式还是完成式，取决于该不定式所表示的动作是发生在谓语动作之前还是之后。根据句意可知，buy birds肯定发生在过去，或者说发生在is said之前，所以其中的不定式要用完成式，故答案选B。又如：Mr. Brown is said to have died of liver cancer. 据说布朗先生死于肝癌。 2. 涉及动名词的动作先后关系 I hear they’ve promoted Tom, but he didn’t mention _________ when we talked on the phone. (江西卷) A. to promote B. having been promoted C. having promoted D. to be promoted (责任编辑：admin) |