初中狀語從句考點(diǎn)歸納

1、狀語從句狀語從句指句子用作狀語時(shí)，起副詞作用的句子。它可以修飾謂語、非謂語動詞、定語、狀語或整個(gè)句子。根據(jù)其作用可分為時(shí)間、地點(diǎn)、原因、條件、目的、結(jié)果、讓步、方式和比較等從句。狀語從句一般由連詞(從屬連詞)引導(dǎo)，也可以由詞組引起。從句位于句首或句中時(shí)通常用逗號與主句隔開，位于句尾時(shí)可以不用逗號隔開。1. 時(shí)間狀語從句(1)時(shí)間狀語從句常用when, as（當(dāng).時(shí)候）, while, before, after, since, till, until, as soon as等連詞來引導(dǎo)。例如：He had learned a little Chinese before he came to C

2、hina.After he finished middle school, he went to work in a factory.(2)在時(shí)間狀語從句里，主句用將來時(shí)態(tài)時(shí)，從句通常不用將來時(shí)態(tài)，用現(xiàn)在時(shí)態(tài)表示將來的動作或狀態(tài)。（主將從現(xiàn)）例如：Ill ring you up as soon as I get to New York.I will tell him everything when he comes back.He wont believe it until he sees it with his own eyes.(3)在帶有till或until引導(dǎo)的時(shí)間狀語從句的主從復(fù)合句

3、里，如果主句用肯定式，其含義是“一直到時(shí)”，謂語動詞只能用延續(xù)性動詞。如果主句用否定式，其含義是“直到才”,“在以前不”, 謂語動詞可用瞬間性動詞。例如：The young man read till the light went out.Lets wait until the rain stops.We wont start until Bob comes.Dont get off until the bus stops.2. 條件狀語從句(1)條件狀語從句通常由if, unless(除非)引導(dǎo)。例如：What shall we do if it snows tomorrow?Dont le

4、ave the building unless I tell you to.(2)在條件狀語從句里，謂語動詞通常用現(xiàn)在時(shí)態(tài)表示將來的動作或狀態(tài)。（主將從現(xiàn)）例如：（必考）Ill help you with your English if I am free tomorrow.He wont be late unless he is ill.(3)“祈使句 + and (or)+ 陳述句” 在意思上相當(dāng)于一個(gè)帶有條件狀語從句的復(fù)合句。例如：Hurry up, or youll be late.=If you dont hurry up, youll be late.Study hard and

5、you will pass the exam.=If you study hard, you will pass the exam.3. 原因狀語從句(1)原因狀語從句通常由because, since, as引導(dǎo)。例如：He didnt come to school because he was ill.As it is raining, we shall not go the zoo.Since you cant answer the question, Ill ask someone else.(2)because表示直接原因，語氣最強(qiáng)。Because引導(dǎo)的原因狀語從句多放在主句之后。A

6、s和since語氣較弱，一般用來表示明顯的原因。由as和since引導(dǎo)的原因狀語從居多放在句首。例如：-Why arent going there?-Because I dont want to.As he has no car, he cant get there easily.Since we have no money, we cant buy it.(3)because和so不能同用在一個(gè)句子里。4. 結(jié)果狀語從句(1)結(jié)果狀語從句由sothat, suchthat引導(dǎo)。例如：He is so poor that he cant buy a bike for his son.She i

7、s such a good teacher that everybody likes her.(2)sothat與such.that可以互換（可能會考）。例如：在由so.that引導(dǎo)的結(jié)果狀語從句中，so是副詞，與形容詞連用。其結(jié)構(gòu)是: “.so + 形容詞（副詞）+ that + 從句”。例如：Mother lives so far away that we hardly ever see her.在由suchthat引導(dǎo)的結(jié)果狀語從句中，such是形容詞，它修飾的可以是單數(shù)或復(fù)數(shù)可數(shù)名詞，也可以是不可數(shù)名詞；名詞前面可以帶形容詞，也可不帶。如果是單數(shù)可數(shù)名詞，前面需加不定冠詞a或an。例如

8、：It was such a hot day that nobody wanted to do anything.有時(shí)上述兩種結(jié)構(gòu)是可以互換的。例如：It was such a wonderful film that all of us wanted to see it again.=The film was so wonderful that all of us wanted to see it again.It is such an important match that nobody wants to miss it.=The match is so important that no

9、body wants to miss it.(3)如果名詞前由many, much, little, few等詞修飾時(shí)，只能用so, 不用such。例如：Soon there were so many deer that they ate up all the wild roses.He has so little time that he cant go to the cinema with you.5. 比較狀語從句比較狀語從句通常由asas（否定not so/as.as）, 比較級 + than等連詞引導(dǎo)。例如：Tom runs faster than John does.This cl

10、assroom is as big as that one.6. 目的狀語從句(1)目的狀語從句通常由 so that, in order that引導(dǎo)。例如：We started early so that we could catch the first train.He studies hard so that he could work better in the future.We used the computer in order that we might save time.(2)so that既可引導(dǎo)目的狀語從句，又可引導(dǎo)結(jié)果狀語從句。區(qū)別這兩種從句的辦法有兩個(gè)：1)目的狀

11、語從句里往往帶有情態(tài)動詞can, could, may, might等。2)從意思上看，目的狀語從句往往表示的目的很明確。例如：Speak clearly so that they may understand you. (目的狀語從句)Jack is badly ill so that he has to rest. (結(jié)果狀語從句)7. 讓步狀語從句(1)讓步狀語從句通常由although, though等連詞引導(dǎo)。例如：Though he is young, he knows a lot.Although I am tired, I must go on working.(2)altho

12、ugh(though)與but不能用在同一個(gè)句子中。例如：我們不能說：Though it was raining hard, but he still went out.應(yīng)該說：Though it was raining hard, he still went out.或It was raining hard, but he still went out.8. 地點(diǎn)狀語從句地點(diǎn)狀語從句常常由where來引導(dǎo)。例如：Go where you like.Where there is a will, there is a way.易混引導(dǎo)詞while, when的區(qū)別：1.when既可以指時(shí)間點(diǎn),與

13、瞬間動詞連用，也可以指時(shí)間段，與延續(xù)性動詞連用（=while）。如：When he came in, his mother was cooking.When (While) we were at school, we went to the library every day.While表示時(shí)間段,因此，while 從句的謂語動詞要用延續(xù)性動詞。如：Please dont talk so loud while others are working.2Because,as,since 的區(qū)別：Because用于表示直接原因,回答why提出的問題，語氣最強(qiáng)；As用于說明原因, 著重點(diǎn)在主句，常譯成

14、由于；since表示顯然的或已知的理由或事實(shí)，常譯成既然。如：Water is very important because we cant live without it.He didnt come yesterday as his mother was ill.Ill do it for you since you are busy.【實(shí)例解析】1.You will stay healthy _ you do more exercise, such as running and walking.A. if B. how C. before D. where2. -Shall we go o

15、n working?-Yes, _ I prefer to have a rest.A. when B. if C. because D. though3.None of us knew what had happened _ they told us about it.A. when B. until C. after D. though4.-I hope youll enjoy your trip, dear!-Thank you, mum. Ill give you a call _ I get there.A. until B. as soon as C. since D. till考

16、點(diǎn)精煉一. 單項(xiàng)填空1. _ hes old, he can still carry this heavy bag.A. Though B. Since C. For D. So2. -Do you know if he _ to play basket ball with us?-I think he will come if he _ free tomorrow.A. comes; is B. comes; will be C. will come; is D. will come; will be3. In the zoo if a child _ into the water and

17、cant swim, the dolphins may come up _ him.A. will fall; to help B. falls; to helpC. will fall; help D. falls; helping4. I dont remember _ he worked in that city when he was young.A. what B. which C. where D. who5. We will stay at home if my aunt _ to visit us tomorrow.A. comes B. come C. will come D

18、. is coming6. The police asked the children _ cross the street _ the traffic lights turned green.A. not; before B. dont; when C. not to; until D. not; after7. I was late for class yesterday _ there was something wrong with my bike.A. when B. that C. until D. because8. Ill go swimming with you if I _

19、 free tomorrow.A. will be B. shall be C. am D. was9. In the exam, the _ you are, _ the _ mistakes you will make.A. careful; little B. more careful; fewestC. more careful; fewer D. more careful; less10. You should finish your lessons _ you go out to paly.A. before B. after C. when D. while11. I hurri

20、ed _ I wouldnt be late for class.A. since B. so that C. as if D. unless12. When you read the book, youd better make a mark _ you have any questions.A. which B. that C. where D. though13. The teacher raised his voice _ all the students could hear him.A. for B. so that C. because D. in order14. He too

21、k off his coat _ he felt hot.A. because B. as C. if D. since15. It is _ that wed like to go out for a walk.A. a lovely day B. too lovely a dayC. so lovely a day D. such lovely a day16. Mary had _ much work to do that she stayed at her office all day.A. such B. so C. too D. very17. _ I felt very tire

22、d, I tried to finish the work.A. Although B. Because C. As D. As if18. _ the day went on, the weather got worse.A. With B. Since C. While D. As19. _ well you can drive, you must drive carefully.A. So long as B. In order thatC. No matter how D. The moment20. Write to me as soon as you _ to Beijing.A.

23、 will get B. get C. getting D. got真題演練(2010河北省卷42. 1) Peter likes reading a newspaper_ he is having breakfast.A. until B. while C. because D. though(2010.江蘇省鹽城市12. 1)Many students didnt realize the importance of study_they left school.A.when B.until C.as D.after(2010四川省內(nèi)江市39. 1)I dont know if it_tom

24、orrow.If it_,we wont go on a picnic.A.rains;rains B.will rain;rains C.will rain;will rain(2010山東省濰坊市29. 1)You have to leave now_you can catch the early bus.A.so that B.as soon as C.because D.if(2010浙江省衢州市23. 1) You should go over your test paper _ you hand it in .A. before B. though C. because D. as

25、 soon as(2010江蘇省無錫市12. 1)Scientists say it may be a few years _it is possible to test the new medicine on patients.A.because B.after C.before D.since(2010年上海市37. 1)We will have no water to drink _we dont protect the earth.A.until B.before C.though D.if（2010江蘇省揚(yáng)州市41）-Could we play football in your pl

26、ayground,Sir?-No,_you have the principals permission（校長許可）.A.if B.unless C.because D.since（2010四川省成都市35. 1）I wont be able to understand what you say,_you speak too quickly.A.if B.though C.because（2010浙江省湖州市22，1）-Is everyone here today?-No.Tom is at home_he has got a bad cold.A.because B.if C.until D

27、.unless（2010山西省27，1）In summer , food goes bad easily _ it is put in the refrigerator.A. until B. if C. unless（2010河南省25，1）_its difficult to make her dream come true，she never gives upA.Though B.Unless C.Because D.If（2010山東省萊蕪市27，1）-I hear Jack Chan will come to Laiwu next week.-Really? _ he comes, m

28、y younger sister will be very happy,AIf BUntil CUnless DBefore（2010貴州省銅仁市35，1）- May I go to the concert with you?- Im afraid not _ you have a ticket, because I have only one.A. since B. if C. unless D. though（2010山東省菏澤市27，1）Mary spends a lot of money on clothes _ her family is not rich.A. because B.

29、 though C. if D. so（2010黑龍江省雞西市29，1）Usually, we dont know how important something is _ we lose it.A. or B. until C. as soon as（2010廣西省定西市15，1）She had a stomachache_she ate something bad.A. so B. because C. or D. although(2010福建三明29. 1)Many children like fried chicken _it is unhealthy food.A.if B.because C.although（