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    (时间状语从句).ppt

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    (时间状语从句).ppt

    Unit6 Topic2 语法专项课件 (时间状语从句),初中英语仁爱版八年级下册,时间状语从句的分类,1. 表示同时性,即主从句的谓语动作同时发生或几乎同时发生。包括:when(当时候),while(当时候),as(当时候),as soon as(一就)等。,时间状语从句的分类,Mary cut her finger when she was making a kite. As she was reading the newspaper, grandma fell asleep.,时间状语从句的分类,2. 表示先后,即主句的谓语动作发生在从句之前或之后。包括:after(在之后),before(在之前)。,时间状语从句的分类,After we heard the news, we were all excited. He made a plan before he went to London.,时间状语从句的分类,3. 表示持续。until(直到才/为止),时间状语从句的分类,1. He waited for his father until it was twelve oclock. 2. He didnt go to bed until he finished his homework.,易错点1,Once you see her, you will never forget her. Please call me as soon as you arrive America.,主将,从现,主祈,从现,易错点3,when/while/as的区别,易错点3,when/while/as的区别,as: 1. She came up as I was cooking.(同时),易错点3,when/while/as的区别,when: 1. When we were at school, we went to the library every day. (在一段时间内) 2. Sorry,I was out when you called me.(call为短暂性动词) 3. When I got to the airport,she had left.(got to后发生),易错点3,when/while/as的区别,while: 1. When While As we were dancing,a stranger came in. (dance为延续性动词) 2. Please dont talk so loud while others are working. (work为延续性动词),【典例1】I didnt believe he could drive _ he told me. A. once B. while C. since D. until,考查时间状语从句连接词。句意:直到他告诉,我才相信他会开车。notuntil直到才,固定搭配,答案选D。,【典例2】Henry will give us a report as soon as he _. A. arrives B. arrived C. is arriving D. will arrive,考查时间状语从句连接词。句意:亨利一回来就给我们作报告。as soon as为时间状语引导词,遵循“主将从现”原则,故答案选A。,语法加油站,总结本单元的语法知识,你掌握了吗,1. when 表示“当的时候”。从句中既可用延续性动词,又可用非延续性动词。从句中的动作既可和主句的动作同时发生,又可在主句的动作之前或之后发生。 如: When I came into the room, I found him lying there asleep. Mary was having dinner when I saw her. When you meet a word you dont know, look it up in the dictionary.,时间状语从句,语法加油站,总结本单元的语法知识,你掌握了吗,2. While while表示在的时候、在期间。它强调主句的动作与从句的动作同时发生或主句的动作发生在从句的动作过程中。while从句中必须是表示动作或状态的延续性动词。 如:The weather was fine while we were in Beijing. While we were swimming someone stole our clothes.While my wife was reading the newspaper, I was watching TV.,语法加油站,总结本单元的语法知识,你掌握了吗,3. as 1)表示“当时”、“和同时”。从句中多用表示动作的动词,而不用be动词或表示感觉、理解、知道这类动词。She dropped the glass as she stood up.2)用于平行的动作中,表示“一边一边。常指一个主语同时进行两个动作。 He sang as he worked.3)用于平行发展的结构中,表示随着。 As it grew darker it became colder.As he grew older he became more confident.,语法加油站,总结本单元的语法知识,你掌握了吗,4. after, before, as soon as, notuntil after表示主句的动作发生在从句动作之后; before表示主句的动作发生在从句动作之前; as soon as表示 “一就”; notuntil表示“直到才”。 You should make a good plan before you do anything important. Ill call you as soon as I come back. She didnt go to bed until her mother came home.,

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