从引导状语从句的连词的意义来看，可分为引导时间、原因、结果、目的、让步、条件、方式、比较、地点等名种从句的连词。
（1）引导时间状语从句的从属连词
①此类连词主要有：when, while, after, before, as, as soon as , until, till, once, since, whenever, no sooner...than, hardly/barely/scarcely...when等。
When I got to the theatre, I found that they had sold all the tickets.当到达剧院时，我发现票已售完。
We should strike while the iron is hot.我们要趁热打铁。
Since he entered the university, he has made great progress in his studies.
They kept on working until it became dark.他们一直工作到天黑。
Once you begin , you must go on. 你一旦开始，就必须继续下去。
You seem to have a ready-made answer, whenever I ask you a question.
每逢我问你问题, 你总好象有现成的答案。
Now (that) you are here, you d better stay.你既然来了，那就不要走了。
No sooner had they got to the field than it began to rain.他们刚到田里就开始下雨了。
Hardly had he set foot on his native land when he felt comfortable.
他一踏上祖国的土地就感到心情舒畅。
注意：no sooner, hardly等位于句首时需用倒装语序。
②every time, each time, next time, the last time, the moment, immediately等，引导句子其作用相当于一个时间状语从句。
She felt a thrill the moment she got into the theatre.她一进剧场就感到一种激动。
Every time he got to Beijing, he came to see me.每次他来北京，他都来看我。
（2）引导原因状语从句的从属连词
此类连词主要有because, as, since, now(that)，等。because引导的从句表示产生某种结果的必然的因果关系，语气较重，可回答why问句；since语气较轻，常位于句首；as则语气最轻。
We couldn t cross the river because the water had risen. 水已经上涨了，所以我们没能过河。
Since everyone is here, let s begin. 既然大家都来了，我们就开始吧。
I must stop writing now, as I have rather a lot of work to do.我必须停笔了，因为我还有许多工作要做。
Now that you ve got a chance, you might as well make full use of it.
The Italian boy was regarded as a hero because he gave his life for the country.
Why use wood when you can use plastic? 既然能用塑料, 为什么还要用木料?
（3）引导让步状语从句的从属连词
此类连词主要有although, though, as, even if, even though, no matter what等。
Though my father is old, yet he wants to do something for our country.
我爸虽然老了，可他还要为国家做点事。
Even if there are difficulties， we must do it well. 即使有困难，我们也要把工作做好。
Young as I am, I know some of the family secrets. 尽管我年龄小，我知道一些家庭秘密。
Nobody believed him no matter what he said. 不管他说什么每人相信他。
Much as I have travelled, I have never seen anyone who s as capable as John.
（4）引导条件状语从句的从属连词
此类连词主要有if, unless, as/so long as, supposing等。
If we go on polluting the world ,it won t be fit for to live in.如果我们继续污染这个世界，那这个世界就会不适合我们生活了。
You will fail unless you work hard. 除非努力你才不会失败。
You can go out as/so long as you promise to be back soon. 只要你保证很快回来，你就可以出去。
What shall we do supposing he won t agree? 假定他不同意，我们怎么办？
The WTO cannot live up to its name if it does not include a country that is home to one fifth of mankind．
如果世贸组织不能容纳占世界人口五分之一的国家，那它就名不符实。
You will be late unless you leave immediately. 如果你不马上走，你要迟到了。
Unless he comes, we won t be able to go. 他不来我们不能走。
（5）表示行为方式的从属连词
表示行为方式的从属连词主要有as，as if/though等。
When a pencil is partly in a glass of water, it looks as if it were broken.当把铅笔一部分放到水里时，铅笔看上去就像断了。
We did as he told us. 我们照他叮嘱的做了。
He spoke as though he knew the question very well. 他说得好像对这个问题知道得很清楚。
注意：以as if引导的状语从句，其谓语动词常用虚拟语气。与现在相反的情况用过去时，与过去相反的情况用过去完成时。
I remember the whole thing as if it happened yesterday. 整个事情我都记得,就好像此事发生在昨天。
He spoke like that as if he had been there before. 他那样说好像他从前去过那里似的。
（6）表示目的的从属连词
表示目的的从属连词主要有that, so that，in order that等。
I hurried so that I wouldn t be late for class. 为了上课不迟到我们赶紧走。
John shut everybody out of the kitchen so that he could prepare his grand surprise for the party.
约翰把大家关在厨房外边，是为了能够为晚会烹饪出人意料的饭菜。
John saved his money in order that he might buy a bicycle. 约翰为了买一辆自行车而把钱节省下来。
Bring it nearer that I may see it better. 把它拿近一些, 以便使我看得比较清楚。
Speak slowly so that we can follow you. 讲得慢些以便我们能跟得上你。
（7）表示结果的从属连词
表示结果的从属连词，主要有that，so...that，so that，such...that等。
They were so pleased to see each other that they forgot everything else.
他们彼此见到面，高兴得把别的事情都忘记了。
It was such a cold day that there was nobody on the street 天气非常寒冷， 以至于街上没有任何人。
It is so cold that all the water pipes have frozen. 天太冷，所有的水管都冻住了。
His behavior was such that we all refused to receive him in our homes.
（8）表示比较的从属连词
表示比较的从属连词主要有than，as等
John plays football as well as, if not better than, David.
约翰踢足球和大维比如果不比他好的话，至少和他踢得一样好。
I think Chinese is more popular than any other subject.我想汉语比其他任何科目都更受欢迎。
Do you think that art is as interesting as music? 你认为美术与音乐一样有趣吗?
（9）表示地点的从属连词
表示地点的从属连词主要有where，wherever等。
You should make it a rule to leave things where you can find them again.
你应当养成习惯，将东西放在你能找到的地方。
After the war, a new school building was put up where there once had been a theatre.
Leave her where she is. 把她留在原地。
You can take it with you wherever you go.你不论去哪里，都可随身携带它。
特殊的从属连词
1、分词转化的连词：considering（考虑到、鉴于），given（考虑到），provided / providing（只要、如果），seeing（既然、考虑到），supposing(假如)。
Considering he s only been learning English a year, he speaks it very well.
鉴于他才学了一年英语，他的英语讲得算是很不错的。
Given that they are inexperienced, they ve done a good job.
考虑到他们没有经验，他们已经是干得很好的了。
She never minds helping anyone who has nowhere to sleep, provided he s reasonable.
任何找不到住处的人，只要他们为人正派，她就乐于帮助。
Seeing he refused to help us, there s no reason why we should now help him.
既然他不肯帮助我们，那我们现在也不必非得去帮助他。
Supposing white were black，you would be right.假如白色都能变成黑色，那你就是对的了。
2、动词转化为连词:save that(只是)，suppose(假定)。
I agree with you, save that you have got one or two facts wrong.
我同意你的意见，只是你有一两处地方弄错了。
Supposing they did not believe him what would they do to him?
如果他们不相信他的话，他们会把他怎样呢?
3、副词转化为连词:directly（一就），immediately（一就），instantly（一就），now that（既然），once（一 旦就）等。
Directly the teacher came in, everyone was quiet.老师一走进来，大家就安静下来了。
I left, immediately the clock struck twelve.钟刚敲12点，我就离开了。
He set off，instantly he heard the news.他一听到这个消息就出发了。
Now（that） you have the chance, you had better make good use of it.
既然有此机会，就该好好利用它一下。(如用过去时态，则一般用now that)
Once you begin, you mustn t stop.一旦开始，就不要停下来了。
4、名词短语用作连词: any moment(无论何时 )，the day(当天就 时)，each time(每次 时)，every time(每当 时)，the instant(一 就)，the minute（一 就 ），the moment（一 就 ），next time（下次 时），the way（正如 的样子）。
Come and see us any moment you can. 什么时候得空请来看看我们。
He called on her the day he arrived. 他到的当天就去看望了她。
Each time we call on him, he is reading. 每次我们去看他，他都在看书。
She smiles every time she sees me. 她见到我时总是面带微笑。
I told you the instant I heard the news. 我一听说那个消息马上就通知了你。
We will leave the minute you re ready. 你准备好我们就走。
The moment he spoke we recognized his voice. 他刚一开口我们就听出他的声音了。
I m going to see him next time he comes here. 下次他来时我一定要会会他。
They didn t do it the way we do now. 他们当时的做法和我们现在的做法不同。
--Did you remember to give Mary the money you owed her? 你记得还欠玛丽的钱了吗？
--Yes. I gave it to her the moment I saw her. 记着了。我一看见她就还给她了。
5、the first time表示 第一次 .时 的用法
（1）the first time表示 第一次 ，引导表语从句时，强调到说话时为止某一情况或动作的次数，主句中系动词是is，从句谓语用现在完成时态；主句中系动词是was，从句谓语用过去完成时态。
This is the first time he has been late this term． 这是他本学期第一次迟到。
That was the first time I had gone to work． 那是我第一次上班。
- Do you know our town at all？ 你了解这座城市吗？
- No，this is the first time I have been here． 不了解。这是我第一次来。
（2）the first time表示 第一次 时 ，引导时间状语从句，从句中谓语用一般过去时态，侧重点不是要说第一次做了什么，而是要叙述另一情况或动作。
The first time Mr Brown came to China he visited the Great Wall．
布朗先生第一次来中国时就游览了长城。
The first time I saw him，he was reading a book．我第一次见到他时，他在看书。
I thought her nice and honest the first time I met her. 我第一次见她就认为她很好也很诚实。
（3）the first time表示 第一次 的情景 ，引导定语从句，从句谓语用一般过去时来表示。
Do you remember the first time we met？你还记得我们第一次见面的情景吗？
