多穿点衣服，以免患感冒。
目的状语从句中常用情态动词may (might) can (could) ,should等放在动词之前，从句往往放在主句之后，主从句之间不用任何标点符号。注意sothat和in order that与so as to和in order to的转换。
结
果
状
语
从
句
,so that
说 明
时
间
状
语
从
句
when
whenever
When I came into the room, he was writing a letter.
当我进屋时，他正在写信。
We shall go there whenever we are free.
我们什么时间有空，我们就去那里。
when指的是“某一具体的时间”。
昨天我回来晚了，因为我值班。
because用来回答why的问题，语气最强一般放在主句之后
since
Since everyone is here, let’s begin our meeting.
既然大家都到了，我们开始开会。
since表示既然或全已知的理由,稍加分析即可表明的原因,多放句首
as
比较：
= We shall go there tomorrow if it doesn’t rain.
Solong as you work hard, you will succeed.只要努力，你就会成功。
只要你努力工作，你就一定能成功。
In case I forget, please remind me about it .
as
He hurried home, looking behind as he went.
他赶快回家，一边走一边向后看。
As time goes by, I likeChinabetter.
随着时间的流逝，我越来越喜欢中国。
as（一边...一边）引导持续性动作，强调主句和从句的动作同时发生；随着。
before
我一听到这首歌，就感到很愉快
hardly…when和no sooner…than的意义相当于as soon as,但只表示过去发生的事情，主句为过去完成时，从句为过去时，如hardly或no sooner位于句首时语气强，而且主句的谓语要用部分倒装。
every time,
each time
last time
directly,
instantly
As soon as I arrive in Shanghai, I’ll write to you.我一到上海就给你写信。I had hardly got home when it began to rain.
我刚一到家，就下雨了。=Hardly had I got home when it began to rain.
地
点
状
语
从
句
where
wherever
Where there is a will, there is a way.
有志者，事竟成。
Where there is water there is life.
哪里有水，哪里就有生命。
You are free to go wherever youwant to.
万一我忘了，请提醒我一下。
So far as I know, the book will be published next month.
据我所知，那本书下月出版。
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。
条件状语从句中的谓语动词的时态一般要用现在时或过去时代替一般将来时或过去将来时。
Be a pupil before you becomea teacher.
先做学生，再做先生。
I finished my task before I went home.
我做完作业才回家。
before译为“在…之前,才,就”
after
He arrived after the game started.
so…that的so后面跟形容词或副词，但是何时接名词
such…that
He gave such important reasons that he was excused.他说出了这么重要的理由，得到大家的谅解。
It is such an interesting novel that all of us want to read it.
next time
by the time,
Every time Itraveledby boat, I got seasick.
我每次乘船都晕船。
。
Next time you come ,you’ll see him.
下次你来的时候，就会见到他。
在时间状语从句中，不能用将来时或过去将来时，而要用一般现在时或一般过去时代替将来时。
比赛开始后，他到了。
till
until
We waited till (until)he came back .
我们一直等到他回来。
She didn’t stop working until eleven o’clock .
她到11点钟才停止工作。
Until he had passed out of sight, she stood there.
as/so long as
in case
so/asfar as
Difficulties are nothing if we are not afraid of them.
如果我们不怕困难，困难就算不了什么了。
We shall go there tomorrow unless it rains.
除非下雨，否则我们明天就去那里。
whenever指的是“在任何一个不具体的时间”。
比较
并列连词
when
I was walking along the street when suddenly someone patted me on the shoulder from behind.
我正在街上走着，这时忽然有人从后面拍我的肩膀。
when意为“这时”或“在那个时候”,可以看作是并列句,这种用法的when分句一般位于句末。
从句常放在句首，说明次要的原因，主句说明结果，常用于口语中。
for连接的是并列句。
now that,
seeing that，
considering that,
Now (that) the weather has cleared up, we can start our journey.
鉴于天气已经晴朗，我们可以启程了。
自从1978年以来中国发生了巨大的变化。
主句动词应为持续性的，从句动词为瞬间的。
状语从句在主句之前时一般用逗号与主句分开，如从句在主句之后则不必用标点符号。
as soon as
hardly…when
no sooner…than
the moment,
the instant,
the second,
immediately,
状语从句表格
状语从句
状语从句是副词性从句，它在句子中担任状语，修饰主句的动词、形容词、副词或句子。根据修饰的方面，状语从句可以分为以下九种。
1、时间状语从句2、地点状语从句3、原因状语从句
4、目的状语从句5、结果状语从句6、条件状语从句
7、方式状语从句8、让步状语从句9、比较状语从句
种类
从属连词
例 句
并列连词for
As he didn’t know much English, he looked up the word in the dictionary .
由于他英语懂得不多，他在字典中查阅这个单词。
It must have rained last night, for the ground isstillwet.昨天一定下过雨，地还湿呢。
No sooner had we got to the station than the train left.
我们刚到车站，火车就走了。
Hardly had we begun when we were told to stop.
我们刚开始就被叫停。
The moment I heard the song, I felt cheerful.
你可以随意到你喜欢的任何地方去。
Wherever you go, you must obey the law.
无论你去哪都要遵守法律。
where与wherever意义基本相同，但后者语气较强，多用于书面语。
原
因
状
语
从
句
because
I came back late yesterday because I was on duty.
so…that
We turned up the radio, so that everyone heard the news.
我们把收音机的音量放大，结果大家都听到了新闻。
He was so excited that he couldn’t say a word.
他十分激动，以致一句话都说不出来。
so that前有逗号为结果状语从句。
while
While it was raining, they went out.
天下雨的时候，他们出去了。
I stayed while he was away.
他不在的时候我在。
All of us are working hardwhilehe is sleeping.(然而：并列连词)