1、,模块十三 状语从句,教师点拨,考点精讲 1 时间状语从句,状语从句的结构(以when为例)： 1When从句(，)主句 2.主句(，)when从句 一、连词：when, while, as, before, after, till, until, since, as soon as等。 二、when 与while的区别： when短暂性动作(常为一般时)或延续性动作(常为进行时)；while延续性动作(常为进行时)。如： When I stopped my car, a policeman came up to me. My wife was cooking when I got home.
2、 I was doing my homework when/while my father was watching TV. While/When we were talking, the teacher came in.,教师点拨,三、till, until用法： 既可以用于肯定句也可用于否定句，可以互换。如： I stayed there till/until I was asked to leave. I didnt leave till/until I was told to. 四、since一般用于完成时。如： I havent got in touch with my parent
3、s since I parted with them in April. She has worked here since she came to Guangdong three years ago.,教师点拨,五、如果主句是将来时、祈使句或者表将来的情态动词句时，从句用一般现在时，有时可用现在完成时，即所谓的“主将从现”的原则。如： Dont get off the bus until the bus has stopped/stops. I will write to you as soon as I arrive/have arrived. Can you send me an ema
4、il when you get home? 注意：while还可以用来表达对比(不是时间状语从句)。 My sister likes math while I am fond of English.(相当于并列句中的and或but) Tom is good at the piano while Sam(is good at)the violin.,教师点拨,考点精讲 2 原因状语从句,连词：because, since, as等。 because表示很强的原因；since/as表示较弱的、不直接的原因，可以译成“既然”。 I am worried now because I have left
5、 my homework at home. Since everyone is here, lets start our meeting. As you dont feel well, lets stay at home today. 注意：because不与so连用。,教师点拨,考点精讲 3 条件状语从句,一、连词if, unless(if.not), as long as(只要)。 二、一定要遵循“主将从现”的原则。如： We will go for a picnic if it is fine tomorrow. You wont improve your study unless yo
6、u work hard. You wont improve your study if you dont work hard. You will achieve your dream as long as you stick to it.,教师点拨,考点精讲 4 让步状语从句,连词：though, although, even though 注意：不与but连用。 He came to see me in such hot weather although he is busy.,教师点拨,考点精讲 5 目的状语从句,连词：so that, in order that等。目的状语从句常是情态动
7、词句。 Speak clearly so that/in order that they can understand you. I got up at 5：00 so that/in order that I could catch the first bus. 当主句语从句主语相同时，从句还可改成不定式结构。如： She eats much less than before so that/in order that she can lose some weight. She eats much less than before so as to/in order to lose some weight.,教师点拨,考点精讲 6 结果状语从句,连词：so.that, such.that等。 结构：soadj./advthat从句；such(adj.)n.that从句(要注意名词的可数性及其出现形式) 例外：so many/much/few/littlen.that从句 He ran so fast that nobody caught up with him. They are such smart children that we all like him.,