北京成人学位英语 语法常识与真题解析.docVIP

谓语动词 （一）动词时态 常考知识点： 条件、时间、让步状语从句的“主将从现”。 将来完成时、现在完成进行时、现在完成时、过去完成时、将来完成时。 一般现在时 在时间、条件状语从句中表示将来的动作，遵循“主将从现”的原则。常用的连词有as soon as, when, until, if, unless.我们引用三道真题。 例1 When are you going to visit your uncle in Chicago? As soon as_____ our work for tomorrow. A. we’re complete B. we’d complete C . we’ll complete D. we complete 【答案】D(_2003年11月34题) 例2 They will go home for winter vocation as soon as they _____their exams. A. have finished B. finish C. finished D. was finished 【答案】B（1996年22题） 例3 When the mixture_____, it will give off a powerful force. heat B. will be heated C. is heated D. has heated 【答案】C（1992年59题） 现在完成进行时 表示从过去某时一直延续到现在得一个动作，这个动作一般会继续延续下去，或者到说话时结束，但是强调到说话时为止一直在做的动作。 I____ on the doo for ten minutes now without an answer. A. was knocking B. am knocking C. knocking D. have been knocking 【答案】D（1998年49题） Since he left the university, he ____ in an accounting company. A. has been working B. had worked C. had been working D. was working 【答案】A（2006年4月16题） 过去完成时 表示在过去的某一时间活动做之前已经完成了的动作（即过去完成时）。这个过去的某一时间可用by， before等介词或连词引导的短语或一个从句表示。 When I went to visit Mrs. Smith last week, I was told she ______ two days before. A. has left B. was leaving C. would leave D. had left 【答案】D（2003年11月40题） About the sixth century A.D. when few Europeans could read, the Chinese _____paper. A. invented B. had invented C. have invented D. had been invented 【答案】B（1997年35题） 表示从过去某一时间开始，一直持续到另一个过去的时间和动作。 例： The chemistry class ____ for five minutes when we hurried there. A. had been on B. was on C. has been on D. would be on 【答案】A（1995年24题） 在含有before， after， as soon as等连词引导的状语从句的复合句中，由于连词本身可以明确表示动作发生的先后顺序，一次主句和从句都可以用一般过去时态表示，而不用过去完成时。 例： I called him as soon as I arrived. 我刚一到就给他打电话。 过去完成时常用在 no sooner …than…, hardly/scarcely/barely…when…, “一……就……”句型之后总，句子倒装。 No sooner had we sat down ____,