内容正文:
状语从句
在复合句中修饰主句或主句中的某一成分的从句叫状语从句。状语从句通常由从属连词或起连词作用的词组引导,有时甚至不需要连词直接和主句连接起来。状语从句根据它表达的意思不同,可分为时间、地点、原因、目的、结果、条件、方式、比较、让步等九类。
提示:
状语从句可放在主句之前或之后,放在主句之前时一般用逗号与主句分开。有时可置于主句中间,前后用逗号。
· 状语从句中的常用连词和特殊连词
从句
类型
常用连接词
特殊连接词
时间状语从句
when,while,as,before,after,since,till,until,as soon as
一些时间名词:the moment,the instant,the minute,the day,next time,every time,the first time,the last time
一些副词:instantly,immediately,directly
固定搭配的连词:
no sooner...than,hardly/scarcely...when
地点状语从句
where
wherever,anywhere
原因状语从句
because,since,as,for
seeing that,considering that,given that,in that,now that,for the reason that
目的状语从句
(so) that,in order that
lest,for fear that,in case
结果状语从句
so/such...that,so that
to the/such a degree that,to the/such an extent that
条件状语从句
if,unless,as long as
suppose,supposing,providing,provided,on condition that
让步状语从句
although,though,even though,even if
while(一般用于句首),
as(用于倒装结构),
wh-ever=no matter wh-,whether...or...
比较状语从句
as,than
the more...,the more...
方式状语从句
as,as if/though
the (same) way,A is to B what C is to D
1、 时间状语从句
时间状语从句是表示时间关系的从句。可以引导时间状语从句的连词很多,根据意义和主从句之间的时间关系,通常可分为以下几种情况:
A. when, while, as
when, while, as表示主句谓语作和从句的谓语动作同时发生或几乎同时发生。
1.when 表示时间点时,从句中用短暂性动词;表示时间段时,用持续性动词。
When I got home, my family were already having dinner. (when表示时间点)
When they were still talking and laughing, the teacher came in. (when表示时间段)
2.while 通常表示一段时间,从句中宜用持续性动词作谓语。
She fell asleep while she was reading the newspaper. 她在看报的时候睡着了。
3.as表示时间点时,从句中用短暂性动词;表示时间段时,用持续性动词。as和when两者经常可以通用。
The thief was caught as when he was stealing in the supermarket.小偷在超市行窃时被逮住。
I saw Jim as when he left the meeting room. 吉姆离开会议室时候我看到了他。
B. before, after
1.before 在一段时间之前。
I must finish all the work before go home. 回家之前我必须干完所有的活。
You must first learn to walk before you try to run. 在想要跑以前,你得先学会走。
必背:
before 常用句型 It is/was/will be +…before …
It wil be five years before we meet again. 五年以后我们才能再见。
It will be not long