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1、 状语从句在复合句中作状语，位置灵活。状语从句可分为时间状语从句，目的状语从句，条件状语从句，让步状语从句，地点状语从句，原因状语从句，方式状语从句，结果状语从句。（一）时间状语从句1. when, as, whilea. when 表时间，从句既可以用延续性动词，又可以用瞬间动词。Eg: When I get there I will call you.如果 when 引导的时状的主语与主句的主语相同，而从句的谓语又是 be 动词时，那么从句中的主语与 be可省。Eg：When （you are）in trouble, you can ask her for help.如果 when 引导的
2、时状的主语与主句的主语相同时，往往可以用“when+分词”的形式代替该状从。Eg：When I came into the room(When coming into the room), I found the light was off.b. while 表时间，从句需用延续性动词，或者主句的动作发生在从句的动作进行过程中。主句的谓语动词通常是非延续性动词。Eg: He came in while I was reading a book.I met her while I was in school.c. as 表时间，与 when 相似，但侧重强调主从句动作同在时间点或同时间段进行。同
3、时可表示主句的动作随着从句的动作的变化而变化。Eg: He jumps as he sings.As the wind rose, the noise increased.2. before(在之前)与 after（在之后）Eg：See me before you leave.I saw them after I arrived.3. till 与 until肯定形式表示的意思是做某事直至某时。否定形式表达的意思是直至某时才做某事。Eg: Wait till/untill I call you.等着直到我叫你。She didnt arrive till/until 6 oclock.她直到 6
4、 点才到但是置于句首时只可用 untill.Until you told me, I had heard nothing of what happened. 直到你告诉我以前，出了什么事我一点也不知道。否定形式有另外两种表达方式：(1)Not until 在句首，主句用倒装。Man did not know what heat was until the early years of the 19th century.=Not until the early years of the 19th century did man know what heat was.(2) It is not u
5、ntil thatHe will not go to bed until his mother comes home.=It is not until his mother comes home that he will go to bed.4. as soon as/the moment/the instant/the second/the minute/immediately 和 hardly/scarcelywhen, no sooner thana. as soon as/the moment/the instant/the second/the minute/immediately
6、表示主句和从句的动作同时发生。译为“一就”Eg：As soon as she heard the news, she began crying.b. hardly/scarcelywhen, no soonerthan 都可以表示一就的意思，但主句谓语动词一般要用过去完成时，从句谓语动词要用一般过去时。Eg：I had hardly / scarcely got home when it began to rain.I had no sooner got home than it began to rain. 注意：如果 hardly, scarcely 或 no sooner 置于句首，句子
7、必须用倒装结构：began to rain.Hardly / Scarcely had I got home when itNo sooner had I got home than it began to rain。1. We called the First - Aid Center_ the traffic accident happened.A. immediately B. shortly C.quickly D. hurriedly2. The roof fell _he had time to dash into the room to save his baby.A. befo
8、re3. A good storyteller must be able to hold his listeners curiosityA when B whenever C.afterB. asC. afterD. untilhe reaches the end of the story.D.until4. I had just started back for the house to change my clothes _ I heard the voices.A. as B. for C. while D.when5. _ the day went on, the weather go
9、t worse. A. WithB. SinceC. WhileD. As(二)目的状语从句1. (so) that/in order that（so）that/in order that 表示“为了，以便”，引导的目的状语从句要用虚拟语气。Eg: He shouted at the top of his voice so that/in order that he might be heard.如果表示“为了，以便”的目的状语从句的主语与主句的主语相同，可用in order to 或 so as to 替代。Eg：I came early so as to/in order to catch
10、 the first train.3. lest, for fear that, in caselest, for fear that, in case 表示“以免，以防”。其中 lest, for fear that 要用(should)+动词原形的虚拟语气；in case后的从句可用虚拟语气，也可用陈述语气。Eg：I will not make a noise lest/ for fear that I (should) disturb you.Take your umbrella in case it rains.Ex.1. He whispered to his wife_ he mi
11、ght wake up the sleeping baby.A. so that2. Roses need special careB. on condition that C. for fear that D. so long asthey can live through winter.A. becauseB so thatC even ifD as3. Leave your key with a neighbouryou lock yourself out oneday.A ever since4. Take your umbrella with you _ it rains.A. if
12、 B. as if C. in case D. as long as5. I hurried _ I wouldnt be late for class.A. since B. so that C. as if D. unless(三)条件状语从句B even ifC soon after D in case1. if: “如果”(如为真实条件句用陈述语气、如为非真实条件句用虚拟语气)Eg: If it snows tomorrow, the flight will be canceled.If I were a bird, I would fly.2. in case, on conditi
13、on that, provinding, provided (that), supposing, supposed (that) :“假如，在条件下”Eg: The mother promises to the son to buy him a toy airplane on condition that he passes his English test.Suppose (that) he does not come, what shall we do?3. unless:“ 除非”（=if not）Eg: We cant get there on time unless we book
14、the earliest flight= We cannot get there on time if we dont book the earliest flight.4. as/so long as:“只要”Eg: We will succeed as long as we keep on trying.Ex1. -What are you going to do this afternoon?-Ill probably go for a walk later on _ it stays fine.A. as far as2. We will have a picnic in the pa
15、rk this SundayA since B if C unless3. You will pass the exam you work hard.C as ifB. so long asC. even ifD. as ifit rains.D untilA unlessB even ifD if（四）让步状语从句1. “虽然，即使，尽管”a. although/ though/ even though/ even ifalthough/ though 语气较弱（尽管），even though/ even if（即使） 语气较强。although 和 though 可以互换，但 though
16、 可以用于倒装也可以不倒装。（参见 as 引导让步状语从句的用法）Eg: Although/ though it was not his fault, he took all the blame.Even if/ Even though you dont like your boss, you should do your work.b. asas 可引导让步状语从句，表示“虽然、尽管”，但要用倒装结构，形式如下：1）. 形容词 + as + 主语 + 系动词。如：Eg: Tired as he is, he offers to help me.2）. 过去分词 + as + 主语 + 系动词
17、。如：Eg: Well-written as the book is, the author is not satisfied and prepared to revise it.3）. 名词 + as + 主语 + 系动词。如：Eg: Student as he is, he does not study hard.4）. 副词 + as + 主语 + 谓语部分。如：Eg: Much as I admire his courage, I dont think he acted wisely. 5）. 动词原形 + as + 主语 + 谓语的另一部分（情态动词或助动词may, might, w
18、ill,would 等）。如：Eg: Try as you will, you wont be able to persuade him.注意：若提前的表语是没有形容词修饰的单数可数名词，要省略不定代词。若提前的是动词原形，与之连用的情态动词要置于原来的位置，即主语之后。though 在引导让步状语从句时可像 as 一样倒装。2. while: 尽管Eg: While its none of my business, I will watch you.3. no matter (what, when, where): 无论（什么，何时，何地）Eg: The old man wouldnt be
19、lieve anything no matter what you said.Please tell me the result no matter when you get it.4. however :不论怎样。however 引导让步状语从句时，句子通常倒装，一般在however 后加形容词或副词。Eg: The father couldnt make his daughter smile however hard he tried.5. whetheror not: 不管是否Eg: Whether he is good or not, the company decided to se
20、nd him abroad.总结：1)although 与 though 在一些情况下可互换，都可以与 yet，still 连用，但不能和 but 连用。2)however 引导让步状语从句时后紧跟形容词或副词。3)while 也可引导让步状语从句，这一点特容易被考生忽视。4)whatever 修饰名词，“无论什么”，however 修饰形容词、副词，“无论多么，无论怎么”。5)even if/even though(即使)与 as if/as though(好像)Ex.41. _ journalism seems like a good profession , I would prefer
21、 to be a teacher.A. Although2. _ I prefer a color T V, I have to buy a black and white one this time.A. As B.Since C.Because D. Although3 .Dont change your mind, _ happens to you.A. which B. what C. whichever D. whatever4. If we work with a strong will, we can overcome any difficulty, _ great it is.
22、A. what B. how C. however D. whatever5._I accept that he is not perfect，I do actually like the person.A. While B. Since C. Before D. UnlessB. As ifC. No matterD. Now that6.Allow children the space to voice their opinion，_they are different fromyour own.A. untilB. even ifC. unlessD. as though（五）地点状语从
23、句1. where: 哪里Eg: Put the medicine where you can easily get it.2. wherever：无论哪里Eg: He follows her wherever she goes.Wherever you are, I will be right there waiting for you.Ex.1.you meet him, tell him the truth.B When C While D As thoughI came across Jane.C that D when(六) 原因状语从句A However2.This was the
24、 placeA where B which1. because直接原因，非推断语气最强回答 why。Eg：I do it because I like it.2. as 不谈自明的原因，语气最弱。Eg: As he is honest and modest, all his friends like him.3. for 放句中，对前面一句话的内容的补充说明。Fot 引导的原因状语从句只能置于主句之后并且必须用逗号将其与主句隔开。Eg: He could not have seen me, for I was not there.4. since/ seeing (that)/ now (th
25、at)/ considering (that)/ in that 通常放句首译为“既然”。Eg: Since the purser didnt tell us what to do, we can relax.Ex.61. He found it increasingly difficult to read,his eyesight was beginning to fail. A andB forC butD or2. Did you return Anns call?-I didnt need toI will see her tomorrow.A thoughBunlessC whenD
26、 because（七）方式状语从句1. as, (just) assoEg: Do as you are told to.As water is to fish, so air is to man。2. as if/ as thoughEg: He looks as if (as though) he had been hit by lighting. 他那样子就像被雷击了似的。（与事实相反，谓语用虚拟语气。）It looks as if the weather may pick up very soon.看来天气很快就会好起来。（实现的可能性较大）Ex.71. Always do to th
27、e othersA which B as C what2. He looks as if heyou would be done by.D thatto die.C wanted D would want(八) 结果状语从句A wants B want1. so that 既可以引导目的状语从句又可以引导结果状语从句。Eg: He worried so that he couldnt sleep.他急得睡不着。I get up early so that I should catch the train.我早起的目的是搭到火车。2. 表示“如此以致”的“sothat”和“suchthat”均可
28、以引导结果状语从句，其中的such是形容词，修饰名词; so 是副词，修饰形容词或名词。具体搭配如下：1）“so+adj./adv.+that”,“so+adj.(a/an)+n.+that”2)“such(a/an)(+adj.)+n.+that”Eg: The boy is so young that he cant go to school.He is such a young boy that he cant go to school.Ex.81.I havent seen Ann forA such B very2. His plan was such a good oneA so
29、B and C thatlong that Ive forgeten what she looks like.C soD toowe all agreed to accept it.D as3. We were inA a rush so anxiousC so an anxious rushwhen we left that we forget the airline tickets.B a such anxious rushD such an anxious rush（九）比较状语从句1. asas : 像一样Eg: My grandma told me that her eyesight
30、 was as good as 10 years before.2. not so (as) as: 不像Eg: The job is not so difficult as I thought it would be.3.than : 比怎么样，Eg: People believe that being a steward is better than most of the other jobs.4. The more, the more : 越 越Eg: The more he listened to that song, the more he enjoyed it.Ex.91.you
31、 meet her,B The more; the morethan us.you love her.A If; and2. She isA cleverC Although; butD The more; moreB clevererC more cleverD the most cleverPractice:1. Dr. Bethune (白求恩) came to China _ he was fifty.2. He began to work _ he got there.3. He didnt come to the lecture, _ he was very busy.4. _we
32、 had enough time, we walked to the cinema.5. We would try to get a car _we could all travel together more easily.6. She wouldnt forget her mothers birthday _ she seldom wrote to her family.7. Were doing everything we can to make things as easy for you _we can.8. The meeting became so disorderly _ th
33、e speaker had to shout to the audience,9. He was angrier _ ever before. 10. The boy was so tired _ he fell asleep on the bus.11. Hard _ he tried, he couldnt force the door open.12. We didnt go home _ we finished the work.13. You may arrive in Beijing early _ you mind taking the night train.14. More
34、people will eat out in restaurants _ they do today.15. _ born in Chicago, the author was famous for his stories about New York.1. He didnt know the results until I told him.2. He stole a bread from the store. It made his father upset.3. He should stay at home and do his homework.4. In the park , I came across him.5. He was too shy. He couldnt speak out a word.