文档介绍：英
语
状
语
从
句
The adverbial clause
状语修饰动词、形容词、副词或整个句子。
当状语为句子时即为状语从句， 一般可以用来表示时间、地点、原因、结果等概念。
(一)、状语从句定义
ly等。
since意为“自从……”，主句常用现在完成时，从句常用一般过去时
As soon as 意为“一…就”
若主句用一般将来时，从句常用一般现在时表将来。
：
由where引导。“在....地方”
如：
Where there is a will, there is a way.
There are plenty of sheep where I live.
Where there’s plenty of sun and rain，the fields are green.
：
because用来回答why 的问题，语气最强，一般放在主句之后。
如：
I came back late yesterday because I was on duty.
常用引导词：because，since，as
Mark is absent today because he is ill.
1）由because引导。
2）由since，as引导。
since表示既然或已知的理由，稍加分析即可知道的原因,多放句首。
as 意为“由于”
如：
Since everyone is here, let’s begin our meeting.
As he was in a hurry, Jack left his bag home.
由于走的匆忙，杰克把包落在了家里。
：
由so that, in order that引导。
目的状语从句中常用情态动词may (might), can (could), should 等连用，从句往往放在主句之后, 主从句之间不用任何标点符号。
如：
I shall write down your telephone number so that
I may not forget it.
Tom ran very quickly in order that he could catch up with Jack.
：
We turned up the radio so that everyone heard the news.
常用引导词：so that , so…that…，such…that（so接形容词、副词；such接名词）
1）由so that，so…that引导。
He was so selfish that nobody wanted to make friends with him.
It is such an nice weather that I’d like to take a walk.
2）由such…that引导。
such…that的such后面跟名词，如果名词是单数就要用such a /an…that, 还可以转换用so…that，语气较强。
It is such an interesting novel that all of us want to read it.
= It is so interesting a novel that all of us want to read it.
It’s such a good chance that we must not miss it.
这是如此好的机会，我们一定不要错过。
：
由if，unless，as/so long as引导。
unless从句的谓语只能用肯定式。unless和if…not同义，unless是书面语，if…not是口语，通常二者可以换用。
We shall go there tomorrow unless it rains.
=We shall go there tomorrow if it doesn’t rain.
You may borrow this book as long as you keep it clean.
I’ll open the window if you don’t mind.
：
though / although意义相同，用法基本一样，前者通俗，口语化，后者正式，多放主句的前面。在句子中一般用了“虽然”就不能再用“但是”（but），但可以与yet或still连用。
Although (Though) he was over sixty, (yet