1、状语从句（一）时间状语从句时间状语从句1when, while, as的区别这三个词都可以用作连接词，表示时间关系，但有所区别。 (1)when表示时间关系时，意思常常是“当(在)的时候”。主句和从句中的动作或事情可以同时发生，也可以先后发生。例如： When we were at school, we went to the library every day.我们在求学的时候，每天都到图书馆去。 (2)while 用作连接词表示时间关系时，意思也是“当(在)的时候”，主句中的动作或事情在从句中的动作或事情的进展过程中发生。它有时可与when通用，但它只能指一段时间(a period of
2、time)，而不能指一点时间的(a point of time)。如上面第一个例句中的when，可以用while代替；而第二个例句中的when，就不能用while代替。例如： Please dont talk so aloud while others are working.别人在工作的时候，请勿大声讲话。 (3)as用作连接词表示时间关系时，意思也是“当(在)时候”，往往可与when或while通用，但它着重指主句和从句中的动作或事情相并发生。例如： I saw him as he was getting off the bus.当他下公共汽车的时候，我看见了他。 2一些表示时间的名词短语
3、也可用来引导时间状语从句the minute, the moment, the instant, every time, the last time, every time。如：The first time I got to the island, I was amazed by its beauty.我第一次到这座岛屿的时候，我就对它的美丽感到惊异。The moment I entered the room, I smelled something usual.我一走进房间里，就觉得不对头。Every time I visit him, he is always reading.每次当我拜访
4、他的时候，他总是在读书。3directly和immediately也可作为连词，引导时间状语从句，意为“一就”，相当于the moment/the instant和as soon as。如：I knew something was wrong directly I arrived.我一到就知道出事了。 The boys did all sorts of mischief immediately my back was turned.我一转身孩子们就捣乱。4before 和afterbefore 引导的从句的动作通常发生在主句动作之后，如果从句是过去时，主句一般要用过去完成时或一般过去时。aft
5、er引导的从句动作通常发生在主句动作之前，如果主句要用过去时，从句则要用过去完成时或一般过去时。例如：The plane had taken off before he arrived at the airport.他到机场前飞机早就起飞了。After he had lived in the south for nearly 20 years, he decided to go to seek his fortune in the north.他在南方生活了将近二十年后，决定去北方碰碰运气。They arrived at the cinema after the film began.电影开始
6、之后他们到了影院。5no sooner.than 和hardly (scarcely). when这两个连词词组都是表示主句与从句动作随即发生，意为“一就”。主句动词用过去完成时。如果no sooner, hardly 或scarcely位于句首，主句要倒装。例如：No sooner had he entered the house than it began to rain.他刚走进房间天就开始下起雨来了。He had hardly gone to bed when the telephone rang.他刚上床电话就响了。6till 和until这两个词的用法十分近似，都表示“直到”，但在
7、句首只能用until。在肯定句中，主句要用延续性动词；在否定句中，主句要用非延续性动词，这时until和before同义。例如：Until they had finished the work, they did not go home.直到他们完成工作才回家。7. It 与before, since, when引导的时间状语从句连用时的区别：(1)It is/has been时间段since . 自从以来已有多长时间了。(2)It is/was时间点when . when 引导的是一个时间状语从句，主句中的 it 指时间，表语由具体的时间充当。常译为“当的时候，是”。 (3)It be 时间
8、段 before . it 指时间， 主句中的时态常是一般将来时或过去时两种时态主句中的表语多是long, not long , 3 days , 2 weeks 等表示时间段的词或短语。常译为“之后”。例如：How long is it since we met last time?自从上一次我们见面以来已有多长时间了？It was a lready midnight when I got home.当我到家时已是半夜了。It was not long before she got married and moved to Japan.不久她就结婚，搬往日本了。（二）地点状语从句地点状语从句
9、用where, wherever引导Where there is a will, there is a way.有志者，事竟成。Wherever they went, they received a warm welcome.无论他们走到哪儿都受到热烈欢迎。（三）原因状语从句原因状语从句用because（因为），since（既然）, as（由于）引导1、由why提问必须用because回答。since, as不回答why的提问，而且从句一般放在句首，because一般放在主句之后。2、because of +名词Because of the rain, we didnt go to the p
10、ark.3、because 和so不可连用，只能选其一。（另有although, but）Why didnt he come to school? Because he was ill.Since I must die, I must. 既然我一定要死，我一定这样做。4、for并列连词，不能放在句首，主要放在两个并列句之间。for所提供的理由为一个补充说明，而且前面常有逗号隔开。The days are short, for it is December now.（四）目的状语从句目的状语从句用so（常用于口语）, that, so that, in order that引导目的状语从句的谓语
11、常含有may, might, can, could, should, would等情态动词。Well sit never to the front so we can hear better.He studied hard so that he might succeed.他努力学习，以便成功。They hurried to the station in order that they could catch the train.他们急忙赶往火车站，以便能赶上火车。（五）条件状语从句1if 和unlessif 表示正面的条件，意为“如果”，unless表示反向的条件，意为“除非，如果不”。例如
12、：If youve got exams tomorrow, why arent you studying？如果你明天有考试，你为什么不学习？The sports meet will begin tomorrow unless it rains.运动会明天将要开始，除非下雨。【专家提醒】条件状语从句中常用一般时表示将要发生的动作。2. providing, provided (that), supposing, suppose (that), as long as, so long as, on condition that 和in case这些连词(词组)意思相近，有“如果，只要，假如，假使，
13、在条件下”等意思。例如：All living things respire as long as they live.所有的生物只要他们活着都要呼吸。Supposing (that) you fail a second time, dont get disappointed, but try again.假如你又一次失败了，不要泄气，再试一次。On condition that the liquid is cooled still further, it will turn to a solid.如果液体进一步冷却的话，会变成固体。3only if和if onlyonly if 引导的从句用陈
14、述语气，意为“只要”； if only引导的从句要用虚拟语气，意为“但愿”，“要是就好了”。例如：only if you have persistence, can you achieve great success.惟有你坚持下去，你才能成功。If only I had wings, I would be able to travel around the world easily.如果我有翅膀，我就能够轻松地环游地球了。（六）结果状语从句结果状语从句由suchthat, sothat, so that, that 引导1. such that 的常用句型such +a/an +形容词+可数
15、名词单数+thatsuch +形容词+可数名词单数+thatsuch+形容词+可数名词复数（不可数名词）+that注意so many （much, few, little） +名词，such a lot of （或lots of）+名词是惯用法，不可乱用。She is such a beautiful girl that we all like her.They were such beautiful flower that we bought home.It was such delicious food that they ate it up.2. so+形容词或副词+thatso+形容词
16、+a/an+可数名词单数+thatHe is so rich that he can buy lot of things for himself.It was so hot a day that we all went swimming.It was such a good day that we all went swimming.3. so that, that都可以引导结果状语从句He didnt study hard, （so） that he failed the exam.4. tooto, enoughto 可以引导结果状语从句与sothat 替换，sothat结构可以用toot
17、o替换必须具备两个条件，一是主句和结果状语从句的主语必须一致，二是从句中的谓语部分必须含有can（could） not.She is so young that she cant go to school.She is too young to go to school.She isnt old enough to go to school.（七）让步状语从句1让步状语从句可由although，though，as，while，even if(though)，whatever，whether.or.，no matter who (when，what.)等引导。Although/Though sh
18、e works very hard，(yet) she makes very slow progress.尽管她学习很努力，但还是进步不快。Whenever Im unhappy(No matter when Im unhappy)，it is my friend who cheers me up.不管什么时候我不高兴，总是我的朋友给我鼓励。【专家提醒】(1)however引导让步状语从句时，与它所修饰的词一起放在句首。(2)英语不允许在though 或although从句后同时用but。如果要强调前后两个部分的对比意义，可以在主句前加上yet或still。2as引导的让步状语从句的常见的几种
19、倒装方式(1)如果从句的谓语部分为“不及物动词副词”时，常将从句中的副词提到从句的句首。Hard as you may try，you will not succeed.尽管你努力了，你可能不会成功。(2)如果从句的谓语部分为“情态动词不及物动词”，常将这个不及物动词提到从句的句首。Wait as you may，he will not see you.尽管你等了，他可能不会见你。(3)如果从句的谓语部分是“系动词单数名词”，则常将这个作表语的名词提前，但这个名词前面的不定冠词要省略。Child as he is，he can tell right from wrong.尽管他还是个孩子，他能
20、明辨是非。3while作“尽管”讲引导让步状语从句时往往放在句首While I understand your viewpoint，I dont agree with you.尽管我明白你的观点，我不赞成你。（八）方式状语从句1as 和just as二者都表示“如；犹如，正如”。just as 比as强调的语气更强。例如：In the early days, people could not count as we do now.在早期日子中，人们不和我们现在一样能计数。Most plants need sunlight just as they need water.大部植物像它们需要水一样
21、，也需要阳光。2as if 和as thoughas if 或as though从句可以用陈述语气，表示可能符合事实的情况；也可以用虚拟语气，表示不符合事实或与事实相反的情况，意为“好像，仿佛”。例如：It looks as though it is going to rain.天看起来要下雨。He spoke as if he were a philosopher.他说话就像是一位哲学家。(从句动词与主语谓语同时发生，从句谓语要用一般过去时)He speaks as if he had been to the moon.他谈起话来就好像是去过月球。(从句动作发生在主句谓语之前，从句谓语要用过
22、去完成时)He speaks as if he would fly to the moon.他谈起话来就好像是要飞往月球。(从句动词发生在主句谓语之后，从句谓语要用would/could/mightdo)（九）比较状语从句比较状语从句由asas, not as（so）as, than, the+比较级，the+比较级引导He swims as well as you. （do）He doesnt swim as well as you （do）.He got here earlier than you. （did）The busier he is, the happier he feels.典
23、型高考英语陷阱题详解状语从句1. “May I go and play with Dick this afternoon, Mum?” “No, you cant go out _ your work is being done.”A. beforeB. untilC. asD. the moment【陷阱】容易误选B，误认为这是考查 notuntil结构。【分析】最佳答案选 C。句中的 your work is being done 表明“你正在做作业”，选 as 表原因。2. “Im going to the post office.” “_ youre there, can you ge
24、t me some stamps?”A. As子 B. WhileC. BecauseD. If【陷阱】容易误选A。【分析】最佳答案选 B。尽管 as 和 while 均可用作从属连词引导时间状语从句，表示“当的时候”，但两者有一个重要区别，就是这样用的 as 从句的谓语不能是状态动词。当然，如果 as 不是表示“当的时候”，其谓语是完全可以用状态动词的。如：I went to bed early, as I was exhausted. 我很累了，所以很早就上床睡了。(此句中的 as 表示原因，意为“因为”、“由于”)请做以下两题，答案均选 while，不选as：(1) _ you are
25、at home alone, please dont leave the door open. A. WhileB. AsC. BeforeD. How(2) _ you are alone with her, tell her that you like her. A. WhileB. AsC. AfterD. How3. After the war, a new school building was put up _ there had once been a theatre. A. that B. whenC. which D. where【陷阱】几个干扰项均有可能误选。【分析】最佳答
26、案选 D。where 在此引导地点状语从句，其意为“(在)的地方”。请做以下类似试题(答案均选 where)：(1) The famous scientist grew up _ he was born and in 1930 he came to Shanghai.A. whenB. wheneverC. whereD. wherever(2) She found her calculator _ she lost it. A. whereB. while C. in whichD. that(3) You should make it a rule to leave things _ yo
27、u can find them again. A. whenB. whereC. thenD. which(4) When you read the book, youd better make a mark _ you have any questions.A. at whichB. at whereC. the place whereD. where(5) You should let your children play _ you can see them.A. whereB. whenC. in whichD. that(6) Now he works in the factory
28、_ his father used to work.A. whereB. whenC. in whichD. that4. The visitor asked to have his picture taken _ stood the famous tower.A. that B. at whichC. whenD. where【陷阱】几个干扰项均有可能误选。【分析】最佳答案选 D。此题与上面一题有些相似，但又有所不同：相似的是，where 均表示“在的地方”，均用以引导地点状语从句；不同的是，此题还涉及倒装，即此句的主语是 the famous tower，谓语是 stood，正常词序为 w
29、here the famous tower stood，使用倒装是为了保持句子平衡，避免头重脚轻。4. They kept trying _ they must have known it was hopeless.A. ifB. becauseC. whenD. where【陷阱】几个干扰项均有可能误选。【分析】最佳答案选 C。when 在此的意思不是“当的时候”，而是“尽管”、“虽然”的意思。又如：He walks when he might take a taxi. 尽管他可以坐出租车，但他却走路。He stopped trying when he might have succeede
30、d next time. 尽管他本来下次就可以成功的了，但他却停止努力了。The boy was restless when he should have listened to the teacher carefully. 这男孩子本来应该专心听老师讲的，但他却坐立不安。有许多同学只知道 when 表示“当的时候”，而不知道它还有其他许多意思，除上面提到的表示“尽管”、“虽然”外，when 还可表示“既然”、“考虑到”。请做下面的试题(答案选D)：Why do you want a new job _ youve got such a good one already?A. thatB. w
31、hereC. which D. when5. He was about to tell me the secret _ someone patted him on the shoulder.A. asB. untilC. whenD. while 【陷阱】几个干扰项均有可能误选。【分析】最佳答案选 C。when 意为“这时(突然)”，主要用于某一动作突然发生于另一动作正在进行或刚要发生之时。此时的 when 可以连用副词 suddenly，也可以不连用它，但值得注意的是，同学们不能单独用 suddenly 来代替 when，如下面各题的答案选A，不选B：(1) I was about to g
32、o out _ the telephone rang. A. whenB. suddenly C. as soon asD. directly(2) We were swimming in the lake _ the storm started. A. whenB. suddenlyC. untilD. before(3) She was walking down the road _ she heard someone shouting for help.A. whenB. suddenlyC. untilD. before6. The fire went on for quite som
33、e time _ it was brought under control.A. whenB. since C. afterD. before 【陷阱】几个干扰项均有可能误选。【分析】最佳答案选 D。before 意为“在之前”，句意是“大火在得到控制之前燃烧了相当一段时间”。类似地，以下两题也选 before：(1) He made a mistake, but then he corrected the situation _ it got worse.A. until B. whenC. beforeD. as(2) Someone called me up in the middle
34、of the night, but they hung up _ I could answer the phone.A. as B. sinceC. untilD. before(3) She is getting better by degrees, but it will be some time _ she is completely well.A. that B. sinceC. whenD. before(4) They sat down opposite each other, but it was some moments _ they spoke. A. afterB. bef
35、oreC. sinceD. when 7. Mother asked me to take more money _ something unexpected should happen.A. in caseB. so thatC. in order thatD. when【陷阱】几个干扰项均有可能误选。【分析】最佳答案选 A。in case 起连词作用，用以引导状语从句，主要有两种意思：一是表示条件，意为“如果”、“万一”；二是表示“目的”，意为“以防”、“免得”。如以下各题也都选 in case：(1) _ I forget, please remind me about it.A. In
36、 caseB. So thatC. In order thatD. When(2) Take your umbrella just _ it rains.A. in caseB. so thatC. in order thatD. when(3) Be quiet _ you should wake the baby.A. in caseB. so thatC. in order thatD. when(4) Take a hat with you in case the sun is very hot.A. in caseB. so thatC. in order thatD. when(5
37、). Ill keep his address _ I need it. A. so thatB. in order thatC. in caseD. when 8. “Shall Mary come and play computer games?” “No, _ she has finished her homework.”A. whenB. since C. unlessD. as soon as【陷阱】几个干扰项均有可能误选。【分析】最佳答案选 C。此句为省略句，答句句首的 No 表明其后省略的是一个否定句，全句补充完整为：She cant play computer games un
38、less she has finished her homework. 请做类似试题(答案均选B)：(1) “Would you mind my sitting here with you?” “No, _ you arent too noisy.”A. whenB. if C. unless D. as soon as(2) “Will he agree to come to join us in the work?” “No, _ we promise him more money.”A. whenB. unlessC. unlessD. as soon as(3) “Can you fi
39、nish the work in time?” “No, _ we dont sleep throughout the night.”状语从句(2013全国卷I)32. Theres no way of knowing why one man makes an important discovery _ another man, also intelligent, fails.A. sinceB. ifC. asD. while(2013北京卷)30. I took my driving license with me on holiday, _I wanted to hire a car.A
40、. in caseB. even ifC. ever sinceD. if only(2013上海卷)30. They promised to develop a software package by the end of this year, _ they might have.A. however difficult B. how difficult C. whatever difficultyD. what difficulty(2013上海卷)36. I cannot hear the professor clearly as there is too much noise _ I
41、am sitting.A. beforeB. until C. unlessD. where(2013天津卷)5. small, the company has about 1,000 buyers in over 30 countries.A. As B. If C. Although D. Once(2013江苏卷)28. In the global economy, a new drug for cancer, _ it is discovered, will create many economic possibilities around the world.A. whateverB
42、. whoeverC. whereverD. whichever(2013安徽卷)23. Its much easier to make friends you have similar interests.A. unless B. when C. even though D. so that(2013安徽卷)33. Its said that the power plant is now large as what it was.A. twice as B. as twice C. twice much D. much twice(2013湖南卷)23. You must learn to
43、consult your feelings and your reason _ you reach any decision.A. although B. before C. because D. unless(2013陕西卷)18. I have heard a lot of good things about you I came back from abroad.A. since B. until C. before D. when(2013山东卷) 26. Mark needs to learn Chinese _ his company is opening a branch in
44、Beijing. A. unlessB. until C. althoughD. since(2013山东卷) 28. _I have to give a speech, I get extremely nervous before I start. A. WhateverB. WheneverC. Whoever D. However(2013重庆卷)25. _ we have enough evidence, we cant win the case.A. Once B. As long as C. Unless D. Since(2013四川卷)7. He is so busy. He
45、cannot afford enough time with his son _ he wants to.A. even if B. as if C. because D. before(2013江西卷)26.There are a small number of people involved, possibly _twenty.A. as few asB. as little asC. as many asD. as much as(2013江西卷)28.She says that shell have to close the shop _ business improves.A. ifB. unlessC. afterD. when(2013辽宁卷)24. One can always manage to do more things, no matter_full ones schedule is in life.A. howB. what C. whenD. where
