2013海天考研英语语法冲刺复习最后一战6
12.D.注意主句now表示现在的时间状语，所以主句是对现在虚拟，从句是对过去虚拟。
13. If the horse won today, it thirty races in five years.
A. would have won B. won C. must have won D. did have won
13.A.从句对过去的虚拟。
14. There is a real possibility that these animals could be frightened, _______a sudden loud noise.
A. being there B. should there be C. there was D. there having been
14.B.从句表示虚拟，而主句是事实。
15. The board deemed it urgent that these files right away.
A. had to be printed B. should have been printed
C. must be printed D. should be printed
15.(D)it是形式宾语，urgent是宾语补足语，that引导的从句是真正的宾语从句，该从句的内容被认为是urgent(急迫的)，这样从句的谓语动词要求用虚拟语气形式，即should(可以省略)+动词原形。因此，本题正确答案是(D)。
②在先行词与定语从句之间插入一个定语。
如：Do you remember one afternoon ten years ago when I came to your house and borrowed a diamond necklace?你还记得吗，十年前的一天下午，我来到你家，找你借了一条钻石项链?
when I came to your house and borrowed a diamond necklace实际上是修饰afternoon而不是修饰 years。ten years ago 实际上是定语后置修饰afternoon。
③先行词与定语从句被谓语分隔开来。此时，先行词通常是句子的主语，因定语从句较长，主句谓语较短，为使句子平衡，常将定语从句移至谓语之后 如：
A new master will come tomorrow who will teach you German.
明天，新(男)老师将来较你德语。
强化训练
16. Jean Wagner’s most enduring contribution to the study of Afro-American poetry is his
insistence that it in a religious, as well as worldly, frame of reference.
A. is to be analyzed B. has been analyzed
C. be analyzed D. should have been analyzed
16.(C)在表示要求、的愿望、的建议、的请求、的命令等含义的名词同位语从句中，从句谓语动词要用虚拟语气形式，即should(可以省略)+动词原形。
17. I would have gone to visit him in the hospital had it been at all possible, but I ______
fully occupied the whole of last week.
A. were B. had been C. have been D. was
17.(D)本道题目的前半句话是对过去情况的一种假设，但事实上并没有发生，而事实上没有发生的真实原因是句子的后半部分由but引导的转折句所表述的真实。因而but所引导的句子中应该用表示志过去事实相符合的表陈述的时态，即一般过去时。
18. I apologize if I you, but I assure you it was unintentional.
A. offend B. had offended C. should have offended D. might have offended
18.(B)此题要求在if从句中选择适当的动词形式，以主句中的动词apologize(抱歉)来看，if从句中表达的内容应该是过去做的事，因此可以排除(A)，因为(A)是现在时。(C)中should+have+过去分词结构表示本来应该做却没有做的事，在此不合题意。(D)选项中的might+have+过去分词表示对过去发生的事情很不肯定的猜测，它表达的内容还不能成为事实，所以藉此道歉真是不知从何说起，因此此处也不合题意。(B)had offended表示当时已经发生了的动作。这是复杂条件句：apologize 是现在，而条件句是表示对过去假设的条件句。
19. If you hadn’t taken such a long time to get dressed, we’d there by now.
A. be B. circles C. is circling D. be circling
19.(A)该句也是一个复杂条件句(或称作混合虚拟条件句)。条件句表示对过去情况的假设，而主句表示对现在情况的假设，但事实上却与此相反，所以正确答案应该是(A)。
20. The sun rises in the east and sets in the west, so it seems as if the sun ________round the earth.
A. were circling B. circles C. is circling D. be circling
20.(A)as if引导的从句要求用虚拟语气，表示同时或将来的情况，动词要用过去式(be动词用were)或would(could等)+动词原形，本句话中指的是当时的情况，所以要用过去式，故(A)是正确答案。
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