第10讲：状语从句 教师版-暑假讲义-2021-2022学年七年级英语牛津上海版上册.docxVIP

PAGE 状语从句 一、基本概念 状语从句指的是在主从复合句中作状语的从句，修饰主句中的动词、形容词或副词等。状语从句由从属连词引导。状语从句放在主句之前时，常用逗号分开；若放在主句之后，一般不用逗号。 二、基本分类 1.时间状语从句：When Susan goes to town, she will visit her grandma. 2.条件状语从句：If he works hard, he will surely succeed. 3.结果状语从句：Waste must be treated so that it does not become a danger to life. 按意义和作用4.目的状语从句：They worked hard in order that they might succeed. 按意义和作用 5.原因状语从句：Mary didnt go shopping because I advised her not to. 6.让步状语从句：Though we are all different, we need never be separate. 7.比较状语从句：I was happier than I had ever been in my life. 8.地点状语从句：I will go where I am needed. 9.方式状语从句：I have changed it as you suggest. 三、用法详解 时间状语从句 when , while, as , after, before, since, as soon as ,till (until), not… when , while, as , after, before, since, as soon as ,till (until), not…until… , … 2）辨析： ※until，till用于肯定句时，表示“直到……为止”，主句必须为持续性动词。 We shall wait until/till he comes back. Everything went well until/till that accident happened. ※not…until/till表示“直到……才……”，主句通常要用短暂动词，这时until和till可用before代替。 I didnt leave until/till/before she came back. People do not know the value of their health till/until/before they lose it. 3）多义： ※when “当…时”I was doing my homework when my mother came in. “正当……时候，这时或那时” when＝and then; at that moment (正在那个时 候) ，并列连词。 They were watching the World Cup when suddenly the lights went out. 当when意思是“正当……时候，这时或那时”，when只能跟在前一分句之后。 ※while “ 当…时, 在…期间” He visited a lot of places while he was traveling. “而，然而”，表前后意义上的对比或转折，为并列连词。 I like pop music, while my brother likes classic music我喜欢流行音乐，而我哥哥喜欢古典音乐。 ※as “在…同时，当…时” “一边…一边…”，强调从句和主句中两个动作交替进行或同步进行。 They talked as they walked. 他们边走边聊。 “随着”As time goes on, its getting warmer and warmer. 随着时间的推移，天气变得越来越暖了。 “由于”，引导原因状语从句。 “正像，正如”引导方式状语从句。 考例： 1.Tom rushed into t he house________ his mother was cooking. A. as B. before C. while　 D. after 2. Yesterday