eg：I got up late.
I was late for school.
Because I got up late, I was late for school. （原因状语从句）
I got up late，so I was late for school. （结果状语从句）
eg：Where I live there are plenty of trees.
Wherever you work, you will gain much valuable experience as long as you are willing to work.
Wherever=no matter where
Everywhere they went, they were warmly received.
Where there is a will, there is a way.
eg: Where you are confident，you will succeed.
eg：Where previously the bank had concentrated on the big infrastructure projects , such as dams, roads and bridges，it begin to switch to projects which directly improved the basic services of a country.
concentrated on ：集中于……
方式状语从句通常由as，as if，as though，the way，what引导；
eg：Always do to the others as you would be done by.
When enter rome do as the romans do.
eg：They completely ignore these facts as if (as though) they never existed. （与事实相反，谓语用虚拟语气。）
He looks as if (as though) he had been hit by lighting.
It looks as if the weather may pick up very soon.
eg：I should do the job the way my father did.
Many Europeans now apparently view the US. the way many Americans view Mexican as a cheap place to vacation, shop and party.
eg：Air is to man what/as water is to fish.
句型：A is to B what C is to D.
eg：A1 Gore calls global warming an "inconvenient truth," as if merely recognizing it could put us on a path to a solution.
put sb. on a path to a solution：找到解决的办法；
可以由that, so that, in order that, lest, for fear that, in case等词引导；
eg: He wrote the name down for fear that(lest) he should forget it.
He took the umbrella with him lest it should rain.
eg：Take the umbrella with you in case it rains.
for feat that：和lest保持一致；
eg：A variety of activities should be organized so that participants can remain active as long as they want and then go on to something else without feeling guilty and without letting the other participants down.
than, as…as…，not so as…，（not) the same as, the+比较级；
eg：Light travels fast than sound.
eg：The sooner，the better.
eg：Girls are thus seen as less valuable than boys and art kept at home to do housework while their brothers are sent to school - the prophecy（预言) becomes self- fulfilling, trapping women in a vicious circle (恶性循环) of neglect.
（1）当……的时候：while, when, as ；
eg：When I was watching TV, my mother came back.
eg：My father is cooking while my mother is reading newspaper.
eg：As time went by, the days became longer and longer.
（2）一……就……：as soon as ,主将从现；用directly，immediately, instantly连接两个句子；一些名词如the minute，the moment, the instant也可表示；no sooner… than, hardly… when后面的句子需要倒装；
eg：I will write to you the moment/minute I arrived in Paris.
（3）特殊单词：by the time that, every/each time（使用时后面不要再加when）
eg: I slept until midnight.
Wait till I call you.
She didn't arrive until 6 o'clock.
eg: Until you told me, I had heard nothing of what happened.
eg：As you sleep you pass through a sequence of sleep states—light sleep, deep sleep and REM (rapid eye movement) sleep—that repeats approximately every 90 minutes.
结果状语从句常由so… that 或 such…that引导；so保留，that可以省略；如此……以至于……；
eg：He didn't abide by the contract so that he was fined.
He was so excited that he couldn't fall asleep.
He made such an inspiring speech that everybody got excited.
比较：so和 such （1）so：so +形容词、副词+that；so+形容词+a/an+名词+that；
eg：The wind was so strong that we could hardly move forward.
He run so fast that I couldn't catch up with him.
It was so hot a day that crops wilted.
He is so lovely a boy that everyone loves him.
eg：It was such a hot day that crops wilted.
He is such a lovely boy that everyone loves him.
(1)连接词：if, once, as long as, on condition that
eg：If winter comes can spring be far behind.
As long as it doesn't rain, we can play.
You can go out on condition that you wear an overcoat.
Modern cars are far tougher to steal, as their engine management computer won't allow them to start unless they receive a unique ID code beamed out by the ignition (点火) key.
连接词：because, since, as, for ，now that, in that, owing to, due to, thanks to, because of , as a result of;
比较：because, since, as和for
I didn't go, because I was afraid.
Since /As the weather is so bad, we have to delay our journey.
He is absent today, because / for he is ill.
He must be ill, for he is absent today.
now that ：既然；
in that :因为，通常只能放在句中，强调重要的，唯一的的原因；
eg：Now that this semester is finished, I am going to rest a few days and take a trip.
Human beings are different from animals in that human can speak and think.
owing to, due to, thanks to, because of , as a result of等短语后面只能接词或短语，不能接从句；
常见的连接词有though, although，as, while, even though
eg：Although/though he is a child, he can live by himself.
Child as/though he is , he can live by himself.
eg：Although/though she works very hard ,she makes very little progress.
Hard as she works, she makes very little progress.
Although/though she is young, she has travelled to many countries to put shows .
Young as she is, she has travelled to many countries to put shows .
eg：He is experienced while he is young.
1.The anti-virus agent was not known
until a doctor find it by chance.
2.I would prefer shopping online to shopping in a department store because __________（它更加方便和省时）
it is more convenient and timesaving.
3.But since water is much cheaper than wine, and many of the fancier brands aren’t available in stores, most diners don’t notice or care.
4. While there’s no question that continuous stress is harmful, several studies suggest that challenging situations in which you’re able to rise to the occasion can be good for you.