(時間狀語從句)-PPT課件

1、Unit6 Topic2 語法專項課件（時間狀語從句）初中英語仁愛版八年級下冊時間狀語從句的分類1. 表示同時性，即主從句的謂語動作同時發(fā)生或幾乎同時發(fā)生。包括：when（當(dāng)時候），while（當(dāng)時候），as（當(dāng)時候），as soon as（一就）等。2大家好時間狀語從句的分類Mary cut her finger when she was making a kite.As she was reading the newspaper, grandma fell asleep.3大家好時間狀語從句的分類2. 表示先后，即主句的謂語動作發(fā)生在從句之前或之后。包括：after（在之后），before

2、（在之前）。4大家好時間狀語從句的分類After we heard the news, we were all excited.He made a plan before he went to London.5大家好時間狀語從句的分類3. 表示持續(xù)。until（直到才/為止)6大家好時間狀語從句的分類1. He waited for his father until it was twelve oclock.2. He didnt go to bed until he finished his homework.7大家好易錯點(diǎn)1Once you see her, you will never

3、forget her.Please call me as soon as you arrive America.主將從現(xiàn)主祈從現(xiàn)8大家好易錯點(diǎn)3when/while/as的區(qū)別9大家好易錯點(diǎn)3when/while/as的區(qū)別as:1. She came up as I was cooking.（同時）10大家好易錯點(diǎn)3when/while/as的區(qū)別when:1. When we were at school, we went to the library every day.（在一段時間內(nèi)） 2. Sorry，I was out when you called me.（call為短暫性動詞）

4、3. When I got to the airport，she had left.（got to后發(fā)生）11大家好易錯點(diǎn)3when/while/as的區(qū)別while:1. When While As we were dancing，a stranger came in.（dance為延續(xù)性動詞）2. Please dont talk so loud while others are working. （work為延續(xù)性動詞）12大家好【典例1】I didnt believe he could drive _ he told me. A. once B. while C. since D. u

5、ntil考查時間狀語從句連接詞。句意：直到他告訴，我才相信他會開車。notuntil直到才，固定搭配，答案選D。13大家好【典例2】Henry will give us a report as soon as he _. A. arrives B. arrived C. is arriving D. will arrive考查時間狀語從句連接詞。句意：亨利一回來就給我們作報告。as soon as為時間狀語引導(dǎo)詞，遵循“主將從現(xiàn)”原則，故答案選A。14大家好語法加油站總結(jié)本單元的語法知識，你掌握了嗎1. when表示“當(dāng)?shù)臅r候”。從句中既可用延續(xù)性動詞，又可用非延續(xù)性動詞。從句中的動作既可和主

6、句的動作同時發(fā)生，又可在主句的動作之前或之后發(fā)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.時間狀語從句15大家好語法加油站總結(jié)本單元的語法知識，你掌握了嗎2. Whilewhile表示在的時候、在期間。它強(qiáng)調(diào)主句的動作與從句的動作同時發(fā)生或主句的動作發(fā)生在從句的動作過程中。while從句中必須是表示動作或狀

7、態(tài)的延續(xù)性動詞。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. 16大家好語法加油站總結(jié)本單元的語法知識，你掌握了嗎3. as1）表示“當(dāng)時”、“和同時”。從句中多用表示動作的動詞，而不用be動詞或表示感覺、理解、知道這類動詞。She dropped the glass as she stood up.2）用于平行的動作中，表示“一

8、邊一邊。常指一個主語同時進(jìn)行兩個動作。He sang as he worked.3）用于平行發(fā)展的結(jié)構(gòu)中，表示隨著。As it grew darker it became colder.As he grew older he became more confident.17大家好語法加油站總結(jié)本單元的語法知識，你掌握了嗎4. after, before, as soon as, notuntil after表示主句的動作發(fā)生在從句動作之后；before表示主句的動作發(fā)生在從句動作之前；as soon as表示 “一就”； notuntil表示“直到才”。You should make a good plan before