九年级中考冲刺7状语从句ppt课件.ppt
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1、初三英语专题复习之,状语从句,何为状语从句?,状语从句类型:时间、地点、原因、目的、结果、条件、方式、让步、比较状语从句九类。,I love you.,I love you very much.,I love you till the end of the world.,I fell in love with you when I saw you at first sight.,时间状语从句,引导时间状语从句的连接词: when, as, while, after,before, since, as soon as, till, until等。 eg: What are you going t
2、o do when you grow up? 遵循主将从现/主情从现/主祈从现原则,when/while/as的区别 (1) when 可延续,可非延 as/while 只跟延续性动词 eg: It was snowing when we got to the airport. Please write while/as I read. (2) when 可先后,可同时 as /while 只同时 eg: He went home when he had finished his homework. Some students were reading while others were wr
3、iting.,(2)before,after表示主句的动作发生在从句的动作之前或之后. eg: Please turn off the light before you leave the room. You can watch TV after you finish homework. (3)until/till 表示主句的谓语动词(延续性动词)一直延续到 until/till 所表示的时间为止。 eg: You may stay here until/till the rain stops. He didnt go to bed until he had finished his work
4、. Until he joined the army, he worked in that factory.,until/till的用法区别: 注意:1. 肯定句中,二者可以通用。 2. 否定句中,表示主句的谓语动词(非延续性动词)直到until所表示的时间才发生。构成句式 not.until 3. till 不用于句首,也不可用于强调句。,(4)since 表示“自以来”,主句用现在完成时,从句用一般过去时。 eg: I have worked in this company since I graduated from college. 注意:Its + 一段时间 + since + 从句
5、 自从已经 eg: Its ten years since I left college. (5)as soon as表示“一就”。 eg: As soon as he arrives, Ill tell him. 主将从现原则,地点状语从句,由 where, wherever 引导。 eg: Where there is a will, there is a way. Wherever you go, I will go with you.,原因状语从句,常用连词 because, since,for和 as引导 because 回答why 提出的问题 since,as 表示既然,由于 fo
6、r 表示附加理由或推断说明 eg: I lent him my bike because he needed it. Lets begin our meeting since /as everybody is here. The days are longer for its spring now.,目的状语从句,引导词或词组: so that, so, in order that, so as that等, 谓语含有may, might, can, could, will, would等情态动词。 eg: He must get up early so that he can catch t
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