诊断练习：
1.      the day went on, the weather got worse.
   A. With          B. Since         C. While         D. As
2.Although he is considered a great writer,       .
   A. his works are not widely read             B. but his works are not widely read
   C. however his works are not widely read      D. still his works are not widely read
3.You will be late     you leave immediately.
   A. unless         B. until         C. if           D. or
4. ---I don’t like chicken       fish.
----I don’t like chicken,     I like fish very much.
A. and; and       B. and; but       C or; and         D. or; but
5.----What was the party like?
----- Wonderful. It’s years     I enjoyed myself so much.
A. after          B. before         C. when         D. since
6.Mother was worried because little Alice was ill, especially     Father was away in France.     A. as         B. hat         C. during        D. if
7.She thought I was talking about her daughter,      in fact, I was talking about my daughter.   A. whom        B. where        C. which       D. while
8.If we work with a strong will, we can overcome any difficulty,      great it is.
  A. what          B. how        C. however        D. whatever
9.Would you like a cup of coffee    shall we get down to business right away?
  A. and          B. hen         C. or            D. otherwise
10.After living in Paris for 50 years he returned to the small town       he grew up as a child.
  A. which       B. where        C. that         D .when
11. After the war, a new school building was put up      there had once been a theatre.
  A. that         B. where         C. which       D. when
12. Why do you want a new job      you’ve got such a good one already?
  A. that          B. where         C. which         D. when
13.---I’m going to the post office.
     ----    you are there, can you get me some stamps?
  A. As         B. While        C. Because        D. If
14._________you have got a chance, you might as well make full use of it.
  A. Now that        B. After        C. Although       D. As soon as
15.You should make it a rule to leave things      you can find them again.
  A. when          B. where         C. then          D. there

基本用法：
状语从句在句中只做状语，可修饰主句中的动词、形容词和副词等。状语从句由从属连词引导，位置可放在句首或句末。放在句首时，从句后面常用逗号；放在句末时，从句前往往不用逗号。状语从句根据含义可分为时间、地点、原因、目的、结果、方式、让步、条件、等八种。状语从句的考查主要在从属连词、时态和语序上。从属连词的选择主要从连词的意义入手；时态主要从一致性和先后关系考虑；语序是陈述句的语序。
一、时间状语从句
常用以下连词：when, as, while, before, after, since, till, until, as soon as, hardly…when…, no sooner…than…, the moment, etc.
1.when引导的从句：从句的动作可以和主句的动作同时进行，也可以先于或后于主句的动作发生。
Eg. I was going out when Li Hua came.  When it rains, I go to school by bus.
They continued their way when the storm had passed.
The train had left when I got to the station.  I shall tell her the news when she comes.
2.as引导的从句：从句的动作可以和主句的动作同时进行。
As the students walked along the river, they sang happily.
3.while引导的从句：强调某一段时间主句和从句的动作在同一时期进行。
Keep an eye on my baby while I’m busy.
While有时表示对比，  I was doing my homework while he was listening to the radio.
4.before引导的从句：表示主句的动作发生在从句的动作之前。
I didn’t know any English before I came here.
I had finished my homework before my parents came here.
5.after引导的从句：表示主句的动作发生在从句的动作之后。
After he closed the door, he left.  After he had finished school he went to the university.
6. since引导的从句：从句一般表示动作的起点，用过去时。主句表示动作的延续的情况，一般用现在完成时。如果主句表示的不是延续的动作而是表示目前的状态，可用一般现在时。  Since he entered the university, he has made great progress in maths studies.
It is 20 years since she joined the party.
7. till/until引导的从句：1)表示“直到”，主句和从句都用肯定式；2）表示“直到…才…”，主句用否定式，从句用肯定式。
Eg. They worked till it was dark..  
She didn’t go to bed until she had reviewed her lessons.
8. as soon as引导的从句：主句和从句一般都用过去时；当主句的时态是一般将来时，从句要用一般现在时代替一般将来时。
Eg. He began to read English as soon as he came to the classroom.
   He will write to me as soon as he arrives there.
二、原因状语从句   常由 because, since, as引导.
Eg. He didn’t come to school because he was ill. （表示直接的因果关系）
As the weather was fine, we decided to go on a trip. （表示明显的原因）
Since everybody is here, let’s begin our meeting.  （表示附带的原因）
三、地点状语从句：   常由where, wherever引导.
Eg. I’ll go where the living conditions are difficult.
Wherever you are , you should work hard.   Make marks where you don’t understand.
四、条件状语从句：常有if, unless, so/as long as, once等连接词或连接词组引导
Eg.  I’ll go to the Great Wall tomorrow, would you like to go with me?
I shall go unless it rains. You may use the book as long as you return it on time.
五、比较或方式状语从句：常由as…as…, than, the more…the more…, as , as if等引导.
Eg.I’m as tall as you, but you are stronger than I.
The more you practise ,the more knowledge you will get.
  We should study as hard as Lenin studied.
The old man runs very fast as if he were a young man.
六、目的状语从句：常由so that, that, in order that引导.
Eg. He set out early (so) that he could catch the first bus.
  She takes notes carefully in class so that she may use them when she reviews her lessons.
七、结果状语从句：常由so that, so…that…,such…that…等词引导.
Eg. The students did the exercises so well that the teacher praised them in class.
  It is such a heavy box that nobody can move it away.
  He got up early so that he caught the first bus.
八、让步状语从句
常由though, although, even if. however, whatever, no matter how/who等词引导.
Eg. Although they did heavy work that day, they were all in high spirits.
   She carried on the job even if she has had a bad cold for several days now.
   However much I tried, I failed to work out the maths problem.

状语从句的特殊连词

状语从句是高考中从句考查的热点。引导状语从句除用常规连词以外，我们还常见到一些表现形态特殊的连词，这类连词可分为以下六种：
一、名词型连词
表时间的有the moment, the instant, the minute, the second（一……就……）every/each time（每当，每次），next time （下次），the last time（上次）， the first time（第一次）；表达方式和条件的有the way（按照，像，如果照这样……下去）；表让步的有no matter…（无论）等.
Eg. The moment he entered the room, Bill fixed the chain across the door.
   You must do the way (=as) your teachers teach you.
  The way(=if) you are studying now, you’ll make much progress.
  No matter how(=However) badly they had slept she was always up early.
二、副词型连词
instantly, immediately/ directly（一… 就…），其语气依次由强到弱；now that（既然）；everywhere（每一的地方）和wherever意思接近；once（一旦）等.
Eg. The young lady rushed into the room immediately he heard the noise.
 Now that they could ride horses, it became easier to hunt the bison.
 Everywhere I go, I find the same thing.
 对比以下句子：I have looked for my pen everywhere.(adv.)
 She went to see him immediately after she got the letter.(adv.)
一． 分词型连词
这类分词失去了日常分词作状语时应考虑的句子主语的逻辑关系，完全成了连词，主要表示条件、原因和让步关系，有providing，provided（多用于正式文体）（that）（假如，只要），supposing（用于问句），suppose（that）（假如）， seeing （that）（既然），considering （that）（考虑到，因为），granting/ granted (that) (即使)等。
Eg. She will go provided her friends can go also.
Supposing/ Suppose she doesn’t come, what shall we do?
Seeing quite a few comrades were absent, we decided to put the meeting off.
Considering they’re just beginners, they’re doing quite a good job.
二． 介词＋名词型连词
on condition that（条件是），in case（如果；以防）in order that（为了，以便）， for fear that（以防），by the time（到…时），in spite of the fact that/in spite that（尽管）, in view of the fact（鉴于）等。
Eg. We’ll let you use the room on condition that you keep it clean and tidy.
   Send us a message in case you have any difficulty.
   He spoke loudly in order that everybody could hear him.
   Shut the door for fear that it will rain.
对比以下用法：   Shut the door for fear of rain.   In case of fire, ring the bell.
三． 呼应型连词
这类连词由两部分构成，前后呼应，有以下几种：
1. 表示时间的no sooner…than…，hardly… when…，scarcely… when…(一…就…)
Eg. He had hardly gone to bed when the door bell rang.
   No sooner had he reached the station than the train left.
2. 表示结果的so/such… that…（如此…以致于…）
Eg. It is such a good book that nobody doesn’t want to get it.
   So fast did he walk that none of us was his equal.
3. 表示比较的as… as…（和……一样）， not as/ so… as(不如)。
Eg. Jack doesn’t work as hard as Jim.
4. 表示让步的whether… or…（无论…还是…）
Eg. Whether he drives or flies, he’ll be here on time.
四． As… as…惯用型连词
这类连词有：as far as（就……而言，尽……所能，只要），so long as（只要），as soon as（一…就…）等。遇到这类结构要注意区分是固定连词，还是as..as…比较结构.
Eg. I will help you as far as I can.
   As long as you don’t lose heart, you’ll succeed sooner or later.
   Could you ring me up as soon as he arrives?

常见考点：
考点一、主句与从句的时态呼应问题；
考点二、连接词的选择（注意区别几组连接词：while / as / when引导时间状语从句；because / since / as / for引导原因状语从句；if / unless引导条件状语从句；so…that / such…that引导结果状语从句等）；
考点三、状语从句与非谓语动词之间的替换；
考点四、状语从句的倒装结构（hardly / scarcely…when；no sooner…than等）
        Can you see as far as the foot of the hill？

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