常用引导词：when, as, while, as soon as, while, before, after, since , till, until
特殊引导词：the minute, the moment, the second, every time, the day，the instant, immediately , directly, no sooner … than, hardly …when, scarcely … when
I didn’t realize how special my mother was until I became an adult.
While John was watching TV, his wife was cooking.
The children ran away from the orchard the moment they saw the guard.
No sooner had I arrived home than it began to rain.
Every time I listen to your advice, I get into trouble.
特殊引导词：wherever, anywhere, everywhere
Generally, air will be heavily polluted where there are factories.
Wherever you go, you should work hard.
常用引导词：because, since, as, since
特殊引导词：seeing that, now that, in that, considering that, given that, considering that,
My friends dislike me because I’m handsome and successful.
Now that everybody has come, let’s begin our conference.
The higher income tax is harmful in that it may discourage people from trying to earn more.
Considering that he is no more than 12 years old, his height of 1.80 m is quite remarkable.
常用引导词：so that, in order that
特殊引导词：lest, in case, for fear that，in the hope that, for the purpose that, to the end that
The boss asked the secretary to hurry up with the letters so that he could sign them.
The teacher raised his voice on purpose that the students in the back could hear more clearly.
常用引导词：so … that, so… that, such … that,
特殊引导词：such that, to the degree that, to the extent that, to such a degree that,
He got up so early that he caught the first bus.
It’s such a good chance that we must not miss it.
To such an degree was he excited that he couldn’t sleep last night.
特殊引导词：as/so long as, only if, providing/provided that, suppose that, in case that, on condition that
We’ll start our project if the president agrees.
You will certainly succeed so long as you keep on trying.
Provided that there is no opposition, we shall hold the meeting here.
常用引导词：though, although, even if, even though
特殊引导词：as(用在让步状语从句中必须要倒装)，while ( 一般用在句首 )，no matter …， in spite of the fact that, while, whatever, whoever, wherever, whenever, however, whichever
Much as I respect him, I can’t agree to his proposal.
The old man always enjoys swimming even though the weather is rough.
No matter how hard he tried, she could not change her mind.
He won’t listen whatever you may say.
特殊引导词：the more … the more … ; just as …， so…; A is to B what /as X is to Y; no … more than; not A so much as B
She is as bad-tempered as her mother.
The house is three times as big as ours.
The more you exercise, the healthier you will be.
Food is to men what oil is to machine. 食物之于人，犹如油之于机器。
常用引导词：as, as if, how
When in Rome, do as the Roman do.
She behaved as if she were the boss.
Sometimes we teach our children the way our parents have taught us.
When ( the museum is ) completed , the museum will be open to the public next year .
He’ll go to the seaside for his holiday if (it is ) possible.
I’m taller than he (is tall ).
The higher the temperature (is), the greater the pressure (is ).
状语从句的"简化"现象常存在于以下五种状语从句中:①由if, unless等引导的条件状语从句;②由although, though, even if / though等引导的让步状语从句;③由when, while, as, before, after, until / till等引导的时间状语从句;④由as, as if等引导的方式状语从句;⑤由as, than等引导的比较状语从句。下面针对这五种情形作一归纳。
If (it is) possible, he will help you out of the difficulty. 如果可能的话,他会帮你摆脱困境。
You must attend the meeting unless (it is) inconvenient to you. 除非情况对你来说不方便,否则你必须出席这次会议。
As (he was) young, he learned how to ride a bike. 他小时候就学会了骑自行车。
Whenever (she is) free, she often goes shopping. 她有空就去逛商店。
Work hard when (you are) young, or you'll regret. 少壮不努力,老大徒伤悲。
While (he was) a young boy, he was always ready to help others. 他在孩提时代就乐于助人。
Although (he was) a farmer, now he is a famous director. 尽管他曾是个农民,而现在是位著名的导演了。
As (she was) walking along the river bank, she was singing a pop song. 她沿着河堤边走边唱着流行歌曲。
Although (he is) doing his best in maths these days, he has still got no good marks. 尽管近来他一直在学数学,但他仍然没有取得好成绩。
He won't go there with us unless (he is) invited. 除非受到邀请,否则他不会和我们一道去那里。
The concert was a great success than (it was) expected. 这场音乐会出乎意料地取得了巨大成功。
He stood up as if (he were) to say something. 当时他站起来好像要说什么。
He wouldn't solve the problem even if (he were) to take charge. 即使他来负责,他也解决不了这个问题。
She looked anxious as though (she was) in trouble. 她看上去很焦急,好像遇到了麻烦。
He had mastered the English language before (he was) in the USA. 他到美国之前就懂英语了。
When the meeting was over, all the people went out of the meeting-room. 当会议结束时,人们都走出了会议室。（= The meeting over, all the people went out of the meeting-room.）