条件状语从句和时间状语从句与主句时态一致的情况(7页).doc
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条件状语从句和时间状语从句与主句时态一致的情况(7页).doc
-条件状语从句和时间状语从句与主句时态一致的情况-第 7 页条件状语从句和时间状语从句与主句时态一致的情况 主从复合句中时态一致(“主过从过,主将从现,主现从任”原则) 主从复合句中时态的一致是中考考点之一。主要有以下几种情况: 【主将从现】 在以when,after,as soon as等引导的时间状语从句以及以if,unless等引导的条件状语从句中,如果主句是一般将来时,从句则用一般现在时。例如:I'll tell her the good news when she comes back.当她回来的时候,我将把这个好消息告诉她。If it doesn't rain, he will come here on time.如果不下雨,他会按时来这儿的。常见的有以下三种情况: 一、条件状语从句的主句是一般将来时,那么从句常常用一般现在时。如: When I grow up, Ill be a nurse and look after patients. 我长大后要当一名护士,照顾病人。 二、如果主句是祈使句,那么从句通常要用一般现在时。 如:Dont laugh at me when I make a mistake. 我犯错误的时候不要笑话我。 三、如果主句是含有情态动词的一般现在时,根据需要从句多用一般现在时。如:You should be quiet when you are in the reading room. 在阅览室时应保持安静。 【主过从过】在含有宾语从句的主从复合句中,当主句的谓语动词为过去时态时,从句须用表示过去的某种时态。例如:He asked when they would go to the party. 他问他们什么时候将去参加聚会。Miss Green said she had been to Beijing before. 格林小姐说她以前曾经去过北京。 【主现从任】在宾语从句中,当主句的时态为一般现在时、现在进行时、现在完成时等时态时,后面从句时态不受主句限制,可根据情况,选用各种适合的时态。例如:Do you know when we'll have a football match?你知道我们什么时候举行足球赛吗?You know he has gone to Shanghai.你知道他已去上海了。 【特别关注】1.当宾语从句表述的是客观事实、科学真理、现在的习惯动作以及格言等时,其时态不受主句限制,而用一般现在时。例如: The teacher told us that light travels faster than sound. 老师告诉我们光速比音速要快。 When I was a student, my teacher often told us that time and tide wait for no man. 当我还是学生的时候,老师常常告诉我们,岁月不等人。2.在"since点时间"句型中,主句通常用现在完成时,从句用一般过去时。例如:He has worked at the factory since he came here. 自从他来到这儿,他就一直在这家工厂上班。另外,在句型"It's+段时间since从句"中,since后面的从句要用一般过去时。例如: It's a long time since we met last. 自从我们上次见面以来已经有好长时间了。3.在复合句中,如果主、从句表示的动作或状态都发生在过去,而且有先后,则在先的用过去完成时,在后的用一般过去时。例如:When he got there, the train had left. 当他到那儿的时候,火车已经开了。 He said he had visited the school before. 他说他以前参观过那所学校。 【小试身手】1. If he _ harder , he will catch up with us soon.(04 北京)A. study B. studies C. will study D. studied 2. I will go swimming with you if I _ free tomorrow.(04哈尔滨)A. will be B. shall be C. am D. was 3.If you _ a chance to study in a foreign country ,just take it .(04 苏州)A. getting B. had got C. will get D. get 4. Dont leave until he _ back.() A. have come B. comes C. will come D. came 5. “ Shall we have the volleyball match tomorrow?” “ Oh, it will be put off if it _.(04 黄冈) A. snows B. is snowing C. snowed D. will snow 6.Tell him about the news when he _ ,John. Yes, I will.(04 宁波) A.comes B.will come C.would D.is coming 7.Tomorrow we will go to the city park_ it is sunny.(05 安徽) A.as soon as B. when C. if D. as 8.Please dont leave until your teacher _back.(05河南)A. will come B .came C. comes D. is coming 9 .I want to know if there _a sports meeting next month . If they _ it , I must get ready for it。(05青岛) A. is,will hold B. will be, hold C. will be, will hold D. will have, hold 10. Mary, what about going boating if it _tomorrow. Good idea.A. not rain B. will rain C. doesnt rain D. wont rain 参考答案:1-5 BCDBA 6-10 ACCBC