内容正文:
语法专题:连词和状语从句
在复合句中,修饰主句或主句谓语的句子叫作状语从句。状语从句可位于主句之前,也可位于主句之后。状语从句可分为时间、地点、原因、结果、条件、方式、让步、比较和目的等九大类。
考点一
状语从句引导词列表
从句类型
从属连词
时间状语从句
as, after, before, once, since, till, until, when, whenever, while, as soon as
地点状语从句
where, wherever, anywhere, everywhere
原因状语从句
because, since, as, now (that), seeing that, considering that, in that
从句类型
从属连词
结果状语从句
that, so that, so/such ...that ...
目的状语从句
so that, in order that, for fear that, in case, for the purpose that
条件状语从句
if, unless, as/so long as, on condition that, in case, provided that
比较状语从句
than, as ...as, not so/as ...as
方式状语从句
as, as if/though, how
让步状语从句
though, although, even if/though, however, whatever, as, while
考点二
时间状语从句
1.表示时间的状语从句可以由when, whenever, as, while, before, until,
since, as soon as等词引导。
When completed,the tunnel will be the longest in the world.
Please write it down before you forget it.
It will be half a year before I come back.
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(1)时间状语从句的3个重点句型
①It will be ...before ...过很久才……
It will be long before they come back.
②It won't be ...before...不久就……
It won't be long before they come back.
It was long before…过了很久才…
It was a long time before the firefighters put out the big fire.
It wasn’t long before…没过多久就…
It wasn’t long before the taxi came.
③It is/has been ...since ...自从……以来多长时间
(2)since引导的从句如果用终止性动词,表示的时间是从谓语动作算起;如果用延续性动词,表示的时间是从动作或状态的结束算起。
It has been a decade since he joined the club.(从加入俱乐部后算起)
It is two years and a half since he was an ambassador to France.(从不再任大使算起)
How long is it since we last went to the theatre?
2.名词词组引导时间状语从句:every/each time(每一次); the moment/minute(一……就……);the first/second time(第一/二次);the last time(最后一次);the day(那一天);the week(那一周)等。
Every time I see him,he looks miserable.
He said he'd phone you the moment he got home.
3.as soon as, instantly, directly, immediately等表示从句动作一发生,主句动作随即发生,通常意为“一……就……”,也可引导表示时间的状语从句。
I came as soon as I heard the news.
I came directly I got your message.
4.no sooner ...than和hardly ...when引导的从句表示“刚……就……”。主句中的动词一般用过去完成时,从句用过去时。若把no sooner,hardly提到句首,主句须倒装。
No sooner had he sat down than the phone rang.
Hardly had the game begun when it started to rain.
考点三
地点状语从句
1.引导地点状语从句的从属连词where,wherever指具体地点时,从句可用于主句之前或之后。
The little girl who got lost decided to remain where she was and wait for her mother.
Keep in touch with your family members wherever you are in the world.
2.地点状语从句在句首时常兼有抽象条件意味。
Where there's a will, there's a way.
3.注意区分where引导的定语从句与状语从句。
When solving the problem a second time, you'd better be more careful where you made a mistake.(地点状语从句)
When solving the problem a second time, you'd better be more careful in the place where you made a mistake.(定语从句)
考点四
原因状语从句
1.because, as, since, now that的用法区别如下表:
引导词
位置
内涵
语气
能否回答why
能否强调
because
主句前或后
直接原因
强
能
能
as
主句前或后
已知原因
弱
不能
不能
since/now that
主句前
—Why are you absent from the meeting?
—Because I am ill.
He is disappointed because he didn't get the position.
As his mother was a great music lover, he lived with music from birth.
Since his music style was new, he decided his hairstyle had to be new too!
2.除了连词引导原因状语从句外,一些介词短语也可以表示原因。如:because of,thanks to,due to,owing to,on account of等。
They were late because of the traffic.
3.for引导的句子表示原因,语气较because弱,类似一种补充说明,一般不用它来回答why提出的问题。它引导的从句不能放在句首,而且前面一般用逗号与主句分开。说明:for是并列连词。
We can’t go, for it’s raining. 由于天下雨,我们不能走了。
He must have gone to bed, for the light is out.
考点五
让步状语从句
1.让步状语从句可由although, though, as, while, even if(though), whatever(wherever, whoever ...), whether ...or ..., no matter who (when, what ...)等引导。
However serious a problem you may have, you should gather your courage to face the challenge.
While the Internet is of great help, I don't think it's a good idea to spend too much time on it.
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as,though引导的让步状语从句多用于书面语,语序要倒装,though也可以用这种形式。)as, though引导的让步从句必须表语或状语提前(形容词、副词、分词、实义动词提前)。其一般结构为“adj./adv./v./v.-ed/v.-ing/n.+as/though+主语+谓语”。
Difficult as the task was, they managed to finish it in time.
Much as I like it, I won't buy the expensive car.
Child as though he was, he knew what was the right thing to do.
考点六
条件状语从句
引导条件状语从句的连词有:if, unless(=if ...not) (除非), so(as)long as(只要), in case(万一),on condition that(条件是),supposing(that)(假设),provided/providing(that)(假如)等。
You'll fail the exam unless you study hard(=if you don't study hard).
As long as you don't lose heart, you will succeed.
Suppose/Supposing(that)they refuse us, who else can we turn to for help?
In case there is a fire, what will we do first?
考点七
方式状语从句
方式状语从句用来表示主句谓语动作发生的方式,常由as“像……一样”,as if(though)“似乎,好像”等引导。
The house was greatly damaged by the truck. We'd better leave things as they are until the police arrive.
He acted as if nothing had happened.
考点八
目的状语从句和结果状语从句
1.引导目的状语从句的连词有:so that, in order that, for fear (that), in case, lest等。
I'll speak slowly so that you can understand me.
In order that we might see the sunrise, we started for the peak early.
Mary didn't want to get out of bed, for fear that she might wake her baby (up).
Take your raincoat, in case it rains.
2.引导结果状语从句的从属连词有:so that, so ...that ..., such ...that ...在非正式语体中,由so ...that ..., such ...that ...引导的句子中that可以省略,注意其结构形式:
Mike is such an honest worker that we all believe him.
=Mike is so honest a worker that we all believe him.
It is such fine weather that we all want to go to the park.
He earned so little money that he couldn't support his family.
状语从句单选专练:
1.______ you’ve tried it, you can’t imagine how pleasant it is.
A. Unless B. Because C. Although D. When
2. He left in ______ a hurry ______ he forgot his key.
A. such, that B. so, that C. the same, as D. such, as
3. He has loved me ______ I were his son.
A. because B. as C. if D. as though
4. I don’t think I’ll need any money but I’ll bring some ______.
A. as last B. in case C. once again D. in time
5. Someone called me up in the middle of the night, but they hung up ______ I could answer.
A. as B. since C. before D. until
6. We must do it well, ______there are a lot of difficulties.
A. as if B. as though C. even though D. even as
7. ______ has taken part in the Athens Olympic Games is worth praising no matter ______ he has won medals or not.
A. Who; if B. Anyone; whether
C. Whoever; whether D. Whoever; how
8. ---It’s a long time ______ I saw you last.
---Yes, and what a pity it is now that it will be a long time ______ we see each other again.
A. before; since B. since; when C. since; before D. when; before
9. The head of the company promised to deal with matters of this sort______ he returned to his office.
A. until B. while C. by the time D. the moment
10. He had already walked three or four miles______ he saw a cart by the side of the road.
A. while B. when C. the moment D. unless
11. Much ______ the young couple needed money to make the down payment for the apartment, they wouldn’t ask their parents for help.
A. although B. as C. even if D. while
12. I have kept the photo ______ I can always see it, as it reminds me of the days when I studied in Britain.
A. at which B. when C. where D. at the place
13. I would appreciate it ______ you can help me with my English this afternoon.
A. because B. until C. when D. if
14. ______ you may be right, I can’t altogether agree.
A. As B. While C. If D. Since
15.______ was 1998 ______ I graduated from the university.
A. It; when B. It; that C. That; when D. That; that
16. The famous scientist grew up ______ he was born and in 1930 he came to Shanghai.
A. when B. whenever C. where D. wherever
17. “It gives me great joy and I feel more pressure than I did ______ I won in China,” Ding Junhui said.
A. that B. when C. which D. how
18. Parents should take seriously their children’s requests for sunglasses ______ eye protection is necessary in sunny weather.
A. because B. through C. unless D. if
19. John shut everyone out of the kitchen _____ he could prepare his grand surprise for the party.
A. which B. when C. so that D. as if
20. ______ everybody knows about it, I don’t want to talk any more.
A. For B. Even C. Since D. However
Key:1-5.AADBC 6-10 CCCDB 11-15 BCDBA 16-20. CBACC
用适当的从属连词填空
1.I don't really like the author, ________ I have to admit his books are very exciting.
2.Half an hour later, Lucy still couldn't get a taxi ________ the bus had dropped her.
3.________ the forest park is far away, a lot of tourists visit it every year.
4.Lessons can be learned to face the future,______ history cannot be changed.
5.Cathy had quit her job when her son was born ________ she could stay home and raise her family.
6.________ had Mo Yan stepped on the stage than the audience broke into thunderous applause.
7.The meaning of the word “nice” changed a few times ________ it finally came to include the sense “pleasant”.
8.You will never gain success _______ you are fully devoted to your work.
9.The young couple, who returned my lost wallet, left ________ I could ask for their names.
10.I'll be out for some time. ________ anything important happens, call me up immediately.
11.It was the middle of the night ________ my father woke me up and told me to watch the football game.
12.One can always manage to do more things, ________ full one's schedule is in life.
13.I took my driving license with me on holiday, ________ I wanted to hire a car.
14.________ small, the company has about 1 000 buyers in over 30 countries.
15.________ we have enough evidence, we can't win the case.
16.Mark needs to learn Chinese ________ his company is opening a branch in Beijing.
17.________ I have to give a speech, I get extremely nervous before I start.
18.In the global economy, a new drug for cancer, ________ it is discovered, will create many economic possibilities around the world.
19.You must learn to consult your feelings and your reason ________ you reach any decision.
20.It's much easier to make friends ________ you have similar interests.
key: 1. though 2. where 3. Although/ While/ Though 4. although/though 5. so that 6.No sooner
7. before 8. if 9. before 10.if 11.when 12.however 13. in case 14. though 15.Unless 16.because
17.whenever 18.wherever 19. before 20. if
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