(1)引导时间状语从句的after, before, when, while, as, until, till, since, as soon as等。
(3)引导原因状语从句的because, as, since等。
(4)引导目的状语从句的so that, in order that等。
(5)引导让步状语从句的though, although, even if等。
(6)引导结果状语从句的so that, so„that, such„that等。 such„that等。
(8)引导名词从句的that, if , whether等。
10.2.1 引导时间状语的连词：when, while, as, after, before, since, till/until, as soon as, once 一旦
注：引导时间状语从句的连词还有：the minute, the moment, whenever, instantly, immediately, no sooner„than, hardly„when„, scarcely„when. each(every, next, the first)time等。 hardly„when„, scarcely„when. each(every, next, the first)time等。
I was about to go out when he came in.
I was walking on the street when it suddenly began to rain.
We should strike while the iron is hot.
It will be five years before we meet again.
As soon as he got there, he wrote to me.
Once he said that, I knew he was lying.
No sooner had he sat down than the bell rang.
I finished my homework before I went home.
He arrived after the class started.
He was doing his homework when I came in.
I came in when /while he was doing his homework.
When /while I was in the town, I saw him twice.
He hurried to school， looking behind as he went.
After spending the weekend in the capital, we took a taxi to the airport.airport.
Waste water from a number of factories is now “cleaned”before flowing back into rivers. cleaned”before flowing back into rivers.
10.2.2 引导原因状语的连词：because，as，since，now that, seeing that因为，由于
He didn’t come to school yesterday because he was ill.
As all the seats were full, he stood up.
Since you have to stay home， why don’t you do some shopping．
Seeing that it’s raining, you’d better stay indoors.
我们不能说“Because John was ill, so I took him to the doctor.”
这个句子应改为Because John was ill, I took him to the doctor.
或John was ill, so I took him to the doctor.
because, since, as与for的区别：
It must have rained last night, for the ground is wet.
4）由于because引导的原因状语从句表示一种直接的原因或理由，所以能够回答why的提问。since, as, for都不能。
It is because he is ill that he is absent from school.school.
10.2.3 引导条件状语的连词：if, unless, as/so long as
We will stay indoors if it rains tomorrow.
They will stand by you even if you don’t succeed．
Don’t touch anything unless your teacher tells you to.to.
老师不让就别动任何东西。 I am happy as long as you are happy.
注：if条件句中有些词如 it is，he is等可以省略；省略后if后可直接接形容词，过去分词或副词。
If true, this will cause us a lot of trouble.
An illness can result in total blindness if left untreated.untreated.
Are you busy this afternoon? If not, I wish you would stay with me for a while.while.
I wonder whether (if) you still study in that school.
I don’t know whether (if) he likes that film. 在下列情况下，只能用whether,不能用if：
Whether he will come to the party is unknown.
The question is whether I can pass the exam.
I haven’t made up my mind whether to go there or not.
10.2.4 引导地点状语的连词： where, wherever, everywhere, anywhere
They went wherever they could find jobs.
Where there is a will, there is a way.
10.2.5 引导目的状语的连词：（so）that，in order that，for fear that唯恐；以免，in case（that）以防，免得
I got up early in the morning so that I could catch the first bus.bus.
Here is a pound in case you should need it.
10.2.6 引导结果状语的连词：（so）that，so„that, such„that, but（that）
My pen fell under my desk, so that I couldn’t see it.it.it.
George often told stories that weren‘t true, so that no one believed him when he told about a tiger in the school yard.
so that引导结果状语从句时，so that前一般有逗号。
His English in one of this articles was so good that Engels wrote him a letter and praised him for it. letter and praised him for it.
It was so lovely a day that we went out.
Such that 引导结果状语从句 引导结果状语从句
|such+ a (an)+形容词+可数名词单数+that从句|
|such+形容词+ 不可数名词 /可数名词复数+that从句|
It was such a hot day that nobody wanted to do anythinganything
He made such rapid progress that before long he began to write articles in English for an American newspaper.newspaper.
4）such与one，no等词一起修饰名词时，这些词放在such前面。即 one, no, any, all, many, some, several„+such+单数或复数可数名词
Once in the examination hall all such trivialities were forgotten.
There is a grave necessity for more such activities.activities.
10.2.7 引导比较状语的连词：than，as„as，not as „as, the 比较极„the 比较极 7）引导比较状语的连词：than，as„as，not as „as, the 比较极„the 比较极
He can speak English as well as a foreigner.
The longer you stay with him, the better you will know him.
10.2.8 引导让步状语的连词： though，although, as, even though, even if, whether„or„however, whatever, whoever, no matter how/ what/ which„ 8）引导让步状语的连词： though，although, as, even though, even if, whether„or„however, whatever, whoever, no matter how/ what/ which„
Though I prefer a colour TV, I have decided to buy a black and white one this time. I prefer a colour TV, I have decided to buy a black and white one this time.
Proud as these nobles are, he is afraid to see me.me.
They will play the game even if it rains hard tomorrow．
No matter what happened, he would not mind. =whatever happened, he would not
though=although(语气强) even though=even if
10.2.9 引导方式状语从句的连词，as正如, as if/though似乎, 好像 引导方式状语从句的连词，as正如, as if/though似乎, 好像
He speaks English as if he were an English-man.
Use a book as a bee does a flower.