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初中英语之 --- 状语从句1时间状语从句：在一个句子中作时间状语的句子。
引导词:when（当…时候）while（当…时候）as（当…时候）after（在…以后）before（在…以前｝ as soon as（—…就｝ since（自从…到现在）till /until（直到…才｝by the time（到…为止）构成：引导同+陈述语序句子2原因状语从句：在一个句子中作原因语的句子，译作“因为”。
连接词:由连词because, s ince, as引导,也可由for引导。
举例：Ididn’ t go to school y esterday bee ause I was i II.3条件状语从句连接词:if如果,u nless （=if n ot＞除非。
（主将从现原则）举例：If it doesn ’ t rai n tomorrow,we will go h iking.4目的、结果状语从句目的状语从句是指在一个句子中充当目的状语的句子，译作“以此來.......”。
结果状语从句是指在一个句子中充当结果状语的句子，译作“所以......或者如此... 以致于”。
引导词：so that, s o…that, in order thatHe came early so that he c ould get a g ood seat.The boy is so I ittle that h e can't go t o school alo ne.5让步状语从句让步状语从句是指在句子中作让步的状语的句子连接词:though,although, e ven though,even if 译作“尽管 ...... ”举例：Altho ugh he is ri ch, he is no t happy.状语从句其它引导词1.时间状语从句常用引导词:when, as, while, as soon as, while，before,after, sine e , till,until 特殊引导同：.. ... 就... ：the minute, the moment, the second，eg: The moment she s aw the littl e dog, she f ell in love with it.每次... :every timel didn’t real ize how spec ial my mot he r was until I became anadult.While John was wat ching TV, hi s wife was c ooking.The c hildren ran away from th e orchard （果园）the moment they saw the guard.Ever y time I listen to your advice, I get into trouble.2.地点状语从句常用引导同：where特殊引导同：whereve r无论哪里，anywhere 任何地方，everywhere 每个地方A new scho ol will be b uilt where i t was a shop ping center.Wherever yo u go, you sh ould work hard.状语从句练习单项选择1.John does n't letever ybodyinthe kitchen __________ h e could makehis sur prisedinner fortheparty.A. which B. when C. so that D. as if 2.I wouldt hankit __________ you call back this a fternoon for the doctor5 smeeting.A.until B. if C. when D. that3.Asfar as Iam concerned （就我而言），education is about learning and the more you learn,—____ A. the betterlife will you get B. the betterlife you will ge tC. you will get the bet ter lifeD.will you get the bet ter life4.Af ter the war, a new school wasbuilt _____________ t here had once be en（曾经有）a theatre.A. that B. where C . which D. whe n5.—Is Mr.Smith in the office?—Yes , __________ he is in charg e of the office, he mustbe there.A.since B. how ever C. whether D. for 6.As your good friendJ will do ____________help you.A. that I can to B. what I canto C. all that I can D. what I can7.Someone called me up in the middle ofthe night, b ut they hung up（挂断电话）____________ I coul d answer the phone.A.as B.since C. until D. before8.We must hurry up __________catchup with the last train.A. that B. so that to C. in order that D. in ord er toLondon 9.No m atter ________ h ard it ma y be, I will carry it out .A. what B. whatev er C.how D. however 1 0. _________you may do, you must do itwell.A. Which B.Whenever C. What ever D.WhenM. ________ you are so weak, you’d better sta y at home.A.Since B. For C. B ecause D. Though 1 5.1saw Mr.Smith last S unday. We had not seen each other ____________ I left .A. as B. before C.since D. till 16.1’11 be back before you ________ .A.will leave B will have left C.leave D. would lea vel7.If the weather ____________ tomor row, we will go picnic i n the centra 1 park.A wil 1 be fine Bis fine Cis going to be fine D h ave been fine18. ________________________ They wen t on working it was late at night.A. eve n if B.as if C. however D. as tho ughl9.l hurr ied _____________ I wouldn't b e late for c lass.A. sine e B. sotha t C.as if D . unless20.T he volleybal I match will be put off if it __________ .A. will r ain B. rain s C. r ained D. is raining【实例解析】1.（2004年北京市海淀区中考试题）You will sta y healthy ________ you do more exerci se, such as running and walking.A.ifB. howC. beforeD. where2.（2004年江丙省中考试题）…Shall we go on wor king?Ye s, _________ I prefer to have a rest.A. whenB. ifC. be causeD. th ough3.（2004年徐州市中考试题）N one of us kn ew what had happened ___________ they told us abo ut it.A. w henB. unti IC. afterD. though4.（2004年泉州市中考试题）••-1 ho pe you’ll en joy your tri p, dear!—Thank you,mum. Til gi ve you a cal I ___________ I get there.A. untilB. as soon a sC. sinceD. till【中考演练】一.单项填空1. ______ he z s old, he c an still car ry this heav y bag.A. T houghB. Si neeC. ForD. So2.•■-Do you know if he ______ to play ba sket ball wi th us?---1 think he wi II come if h e _______ fre e tomorrow.A. comes; i sB. comes;will beC.will come;isD. will come; will b e3.In the z oo if a chil d _____ into the water a nd can't swi m, the dolph ins may come up _________ him.A. will fall; to he IpB. fall s; to helpC. will fall; help D . falls; hel ping4.1don z t remember _________ he worked in th at city when he was youn g.A. whatB. which C . where D.who5.We wil I stay at ho me if my aunt __________ to visit us t omorrow.esB. c omeC. will comeD. is coming6.Th e police ask ed the child ren _______ cross the st reet _________ the traffi c lights tur ned green.A. not; befo reB. don't; whenC. n ot to; untilD. not; af ter7.1was late for cla ss yesterday ________ t he re was somet hing wrong w ith my bike.A. when B . that C. u ntil D. bee ause8.I’ll go swimming with you if I _________ f ree tomorrow .A. will b eB. shall beC. am D . was9.In t he exam, the ________ yo u are, _______ the ________ mistakes y ou will make .A. carefu I; littleB. more ca reful; fewes tC. more c areful; fewe rD. more c a ref u I; less10.You shou Id finish yo ur lessons _______ you g o out to pal y.A. beforeB. afterC. whenD.while11.1hurried _____ I wouldn't be late for class.A.sinceB. s o thatC. a s ifD. uni ess12.When you read the book, you'd better make a mark ________ you have any questio ns.A. whi chB. thatC. where D . though13.The teacher raised his v oice ________ a ll the stu dents could hear him.A. forB. s o thatC. b ecauseD. i n order14.H e took off h is coat ________ h e felt hot.A. be causeB. asC. ifD.since15.It is ______ th at we'd like to go out f or a walk.A. a lovely dayB. t oo lovely a dayC. so lovely a dayD. such Io vely a day16 . Mary had _______ m uch w ork to do th at she staye d at her off ice all day.A. suchB.soC. tooD. very17.______ I fel t very tired , I tried to finish the work.A. AlthoughB.BecauseC.AsD. As if18.______ t he day went on, the weat her got wors e.A. WithB. SinceC. WhileD.As19.______ well you c an drive, yo u must drive carefully.A. So long asB.ln order tha tC. No ma tter how D . The momentBeijing20. Write to me as soon as you _________ to.A . will get B. get C. g etting D. g ot二.根据中文意思完成下列英语句子1.不管他跟我开什麽玩笑，我都不生气。
英语状语从句解题技巧及练习题(含答案)及解析一、初中英语状语从句1．Daming hasn't done much exercise _______ he got his computer.A．when B．if C．though D．since【答案】D【解析】试题分析：句意：自从有了电脑，大卫就没有做许多运动了。
A. when当……时；指时间；B. if如果，表示条件；C. though虽然，尽管，表示让步；D. since自从，表示时间的起点。
不锻炼是从有电脑开始的，表示时间的起点，用since。
故选D。
考点：考查连词辨析。
2．Rony will get a chance to work in this company ________ he doesn’t pass the interview. A．unless B．when C．if D．after【答案】A【解析】【详解】句意“除非罗尼没有通过面试，否则他将有机会在这个公司上班”。
A.除非；B.当……时候；C.如果；D.在……时候。
根据句意可知，表示“除非他没有通过面试”，故选A。
3．It is necessary for children to exchange ideas with parents from time to time ________ a good parent-children relationship could be set up.A．so that B．because C．as soon as【答案】A【解析】【详解】句意“为了建立良好的亲子关系，孩子们有必要不时地与父母交流思想”。
A.目的是，为的是（引导目的状语从句）；B.因为（引导原因状语从句）；C.一……就……（引导时间状语从句）。
根据句意可知，表示“目的是为了建立良好的亲子关系”，表示目的，故选A。
4．__________ you have tried it on, you can’t imagine how pretty the new style skirt is. A．Because B．Although C．Unless D．When【答案】C【解析】本题的含义是如果你不尝试一下，你将不能想象一下这件新款式的裙子有多么漂亮，unless表示如果不的意思，故本题选C。
初中英语知识点归纳时间状语从句的引导词和结构时间状语从句是英语中一种常见的句子结构，用来表示时间上的关系。
正确使用时间状语从句可以让句子更加准确和流畅，提高语言表达的准确性。
本文将对初中英语中常见的时间状语从句的引导词和结构进行归纳总结。
一、前置时间状语从句1. 引导词：when（当...时候）、while（当...的时候）、as（当...时候）、before（在...之前）、after（在...之后）例句：- When I was a child, I used to play with my friends in the park.- While he was cooking dinner, the phone rang.- As I was leaving the house, I remembered to take my umbrella.- Before I went to bed, I finished my homework.- After she finished her work, she went shopping.2. 引导词：once（一旦）、as soon as（一...就）、the moment（一...就）、the minute（一...就）例句：- Once you start reading this book, you won't be able to put it down.- As soon as the bell rang, the students rushed out of the classroom.- The moment she saw him, her face lit up with joy.- The minute I arrived at the station, the train left.二、后置时间状语从句1. 引导词：when（当...时候）、while（当...的时候）、before（在...之前）、after（在...之后）、until/till（直到...的时候）、since（自...以来）例句：- I will call you when I arrive at the airport.- She likes to listen to music while she's doing homework.- I went to bed before it started raining.- After she finished her meal, she paid the bill and left.- He didn't speak up until/till the end of the meeting.- Since you have been away, many things have changed.2. 引导词：once（一旦）例句：- You will succeed once you put enough effort into it.三、并列时间状语从句1. 引导词：when（当...时候）、whenever（无论何时）、while （当...的时候）、as（当...时）例句：- You can come to my house when you have time.- Whenever I see a dog, I can't help but smile.- While I was reading a book, my brother was watching TV.- As she was walking in the park, she saw a beautiful flower.2. 引导词：before（在...之前）、after（在...之后）例句：- I will finish my homework before I go out to play.- After she finished her lunch, she went for a walk.以上是初中英语中常见的时间状语从句的引导词和结构的归纳总结。
初中英语知识点归纳目的状语从句的引导词目的状语从句是英语语法中的重要概念，它用来表示目的或原因。
在句子中作为状语，起到补充说明的作用。
正确认识和灵活运用目的状语从句的引导词对于提高英语语言的表达能力至关重要。
本文将对初中英语中目的状语从句的引导词进行归纳总结，并提供相关例句进行解释和说明。
1. 为了 (In order to)表示目的或原因，引导目的状语从句。
例：- Lily got up early today in order to catch the first bus to the park.- 今天Lily早起是为了赶上去公园的第一班车。
2. 为了不 (So as not to)表示为避免某种不良后果或者为了实现某种目标，引导目的状语从句。
例：- Tom kept his voice down so as not to wake up the baby.- Tom压低嗓音是为了不吵醒宝宝。
3. 为此 (So that)表示目的、结果或原因，引导目的状语从句。
例：- David studied hard so that he could get a good grade in the exam.- David努力学习是为了在考试中取得好成绩。
4. 以便 (So that)表示目的或原因，引导目的状语从句。
例：- I will buy some groceries on my way home so that we won't run out of food.- 我在回家的路上会买些食品，以便我们不会断粮。
5. 以免 (Lest)表示为了避免某种不良后果，引导目的状语从句。
例：- She walked slowly lest she should slip on the wet pavement.- 她走得很慢以免在湿滑的人行道上滑倒。
6. 为了给…一个机会 (For fear that)表示担忧或对某种情况的忧虑，引导目的状语从句。
（英语）初中英语状语从句答题技巧及练习题(含答案)及解析一、初中英语状语从句1．If you study hard, you ________ into a good senior high school.A．got B．will get C．get【答案】B【解析】【详解】考查条件状语从句时态的用法。
句意：如果你努力学习，你_______进入一个好点的高中。
A. got 表示一般过去时；B. will get 是一般将来时；C. get 是一般现在时。
连词if引导的条件状语从句中，主句是一般将来时，条件状语从句用一般现在时表示将来的动作。
由句意可知，主句是将来发生的动作，用一般将来时，故选B。
2．-- Can’t I park my car free here?-- You can, for four hours, __________ you spend over 100 yuan in this supermarket. A．though B．if C．unless【答案】B【解析】【详解】句意：-我不能把车免费停在这里吗？- 如果你在这家超市花费超过100元，你可以免费停车四个小时。
though 虽然；if 如果；unless 除非。
这里是形容一种条件，如果消费超过100元，就能免费停车，故选B。
3．--- Do you know what time Daniel Xuzhou tomorrow?---At 2:00 p. m. I will meet him when he at the airport.A．gets to; arrives B．will get to; will arriveC．will get to; arrives D．gets to; will arrive【答案】C【解析】句意：——你知道丹尼尔明天什么时候去徐州吗？——下午2:00点。
当他到达机场时我将与他会面。
状语从句状语从句用来修饰主句中的动词，副词和形容词的从句叫状语从句。
根据其含义状语从句可分为时间状语从句，地点状语从句，条件状语从句，原因状语从句，结果状语从句，比较状语从句，目的状语从句，让步状语从句。
1. 时间状语从句(1)时间状语从句常用when, as, while, before, after, since, till, until, as soon as等连词来引导。
例如：It was raining hard（rain hard 下大雨）when got to school yesterday.While he was doing his homework, the telephone rang.As he walked along（沿着走）the lake, he sang happily.He had learned a little Chinese before he came to China.After he finished middle school, he went to work in a factory.(2)在时间状语从句里，通常不用将来时态，用现在时态表示将来的动作或状态。
例如：I’ll ring you up as soon as I get to New York.I will tell him everything when he comes back.He won’t believe it until he sees it with his own eyes.(3)在带有till或until引导的时间状语从句的主从复合句里，如果主句用肯定式，其含义是“一直到……时”，谓语动词只能用延续性动词。
如果主句用否定式，其含义是“直到……才……”, “在……以前不……”, 谓语动词可用瞬间动词。
例如：The young man read till the light went out（熄灭）.Let’s wait until the rain stops.We won’t start until Bob comes.Don’t get off（从下来）until the bus stops.【Till是指直到某一特定事件发生的时候，而在那个时刻之后，该事情或状况仍将持续。
初中英语知识点归纳原因状语从句原因状语从句是英语中的一个重要知识点，用于描述造成某种结果的原因。
它通常由一个引导词引导，如because、since、as，以及由why引导的特殊疑问句。
本文将对初中英语中常见的原因状语从句进行归纳和总结。
1. 因果关系因果关系是原因状语从句常用的一种表达方式。
例如：- I couldn't attend the party because I was busy with my homework.- Since it was raining heavily, we decided to stay at home.- They had to cancel the trip as the bus broke down.这些句子中的原因状语从句表达了导致某种结果的原因。
2. 原因和原因结果有时候，一个原因状语从句可以带来多个原因结果。
例如：- She missed the train because she overslept and there was heavy traffic.- He failed the exam as he didn't study hard and was sick on that day.这些句子中的原因状语从句使用了连词"because"或"as"，并列列举了两个或更多的原因结果。
3. 引导词的用法在原因状语从句中，根据具体语境，可以使用不同的引导词。
例如：- Because he was tired, he fell asleep during the movie.- Since she loves animals, she wants to become a veterinarian.- I don't know why he left early.- She couldn't go to the party as she had to babysit her younger sister.这些句子中的引导词分别是"because"、"since"、"why"和"as"，它们根据主句和从句之间的逻辑关系来选择使用。
（英语）初中英语状语从句技巧(很有用)及练习题含解析一、初中英语状语从句1．-Is your WeChat account （账户） safe?-Yes, even my father can't use it __________ I tell him the password.A．when B．unless C．while D．if【答案】B【解析】【详解】句意：-你的微信账号安全吗？-是的，如果我不告诉他密码甚至我的爸爸都不能使用它。
when当…时候；unless除非，如果不；while当…时候；if如果。
根据句意my father can't use it…可知，这里应表示“不告诉他密码”，故应选B。
2．—I see Bob, he’s always listening to music.—Yeah, he’s crazy about it.A．Whenever B．Although C．Since【答案】A【解析】【详解】句意“-无论我什么时候看到鲍勃，他总是在听音乐。
-是的，他对音乐很疯狂”。
A.无论何时（引导时间状语从句）；B.尽管（引导让步状语从句）；C.自从（引导时间状语从句）。
根据句意可知，译为“无论何时”，故选A。
3．-Have you improved your spoken English？-Not yet．I'll try my best______I am not good at it now．A．so B．although C．but D．until【答案】B【解析】【详解】句意：——你提高你的英语口语了吗？——还没有．虽然我现在还不擅长，但是我会尽力的．考查连词辨析。
A. so所以；B. although 虽然；C. but但是；D. until直到。
根据语境推测句意是——你提高你的英语口语了吗？——还没有．虽然我现在还不擅长，但是我会尽力的．在这里两个句子之间存在一个相反的让步关系，though/although/even though“虽然；尽管”，引导让步状语从句，故选B．本题主要考查连词的用法，连词在句子中主要起联系上下文的作用，他们之间的区别就是表示逻辑关系的不同，所以在解题时先要理解上下文含义，然后根据上下文逻辑关系选择合适的连词．前后句之间是让步关系．4．The nurse won’t leave her patients ______ she’s sure somebody else takes good care of them. A．if B．because C．since D．unless【答案】D【解析】【详解】句意：这个护士如果不确定其他人照顾她的病人，她不会离开他们。
初中英语知识点归纳结果状语从句的引导词与用法结果状语从句是英语语法中的一种从句类型，用于表达一个动作或情况发生后的结果或后果。
在初中英语中，结果状语从句的引导词有很多种，下面将详细介绍一些常用的引导词及其用法。
1. so + 主语 + 谓语：表示结果、因此。
例如：She was late for school, so she missed the first class.（她上学迟到了，所以她错过了第一节课。
）2. such + 名词 + that + 句子：表示如此...以至于...例如：It was such a nice day that we decided to go for a picnic.（天气非常好，我们决定去野餐。
）3. such + 形容词 + 名词 + that + 句子：表示如此...以至于...例如：He was such a clever boy that he solved the math problem in one minute.（他是个聪明的男孩，他用一分钟解决了这个数学问题。
）4. enough + 形容词/副词 + to + 动词原形：表示足够...以便...例如：He is old enough to do the housework by himself.（他已经足够大了，可以自己做家务。
）5. too + 形容词/副词 + to + 动词原形：表示太...以至于...例如：The book is too difficult for me to understand.（这本书对我来说太难以理解了。
）6. such a + 形容词 + 名词 + that + 句子：表示如此...以至于...例如：It was such an interesting movie that I watched it twice.（这是一部非常有趣的电影，我看了两遍。
）7. as a result：作为结果例如：He didn't study hard, as a result, he failed the exam.（他没有努力学习，结果考试不及格了。
状语从句 状语从句（Adverbial Clauses）状语从句即指在主从复合句用作状语的从句。按照其意义，状语从句可分为时间状语从句、地点状语从句、原因状语从句、目的状语从句、结果状语从句、条件状语从句、让步状语从句等。状语从句的位置比较灵活，可以置于句首，也可以置于句末。
1. 时间状语从句
(1) when引导的时间状语从句 ①when引导的时间状语从句，其动词既可以是延续性动作的动词，也可以是瞬间性动作的动词，而且可以表示主句的动作和从句的动作同时发生，或者从句的动作发生在主句的动作之前。如： when you apply for a job, you must present your credentials. 当你申请工作时，你必须递交你的有关证件。（同时） when the students heard the teacher‟s footsteps, they all ｓｔｏｐｐｅｄ talking.
当学生们听到老师的脚步声时，他们都停止了讲话。（从句动作发生在前） ② when还可表示just then（正在那时，突然）的意思，此时其所引导的从句只放在主句之后。如： we were about to start when it began to rain. 我们正要动身，突然天下起雨来。 (2) as引导的时间状语从句 as引导的时间状语从句其动词的动作是延续性的，而且侧重表示主句和从句的动作并相发生： We were having breakfast as she was combing her hair. 她梳头时我们在吃早饭。 (3) while引导的时间状语从句 while表示“在某一段时间里”或“在……期间”，其所引导的从句的动作是延续性的，并侧重表示和主句的动作同时发生。如： I can learn while I work. 我可以边工作边学习。 (4) before引导的时间状语从句
① before“在……之前” I‟ll be back before you have left. 你离开之前我就会回来。 ② before“……之后才” It may be many years before we meet again. 可能要过许多年我们才能再见了。 It was three days before I came back. 他三天后才回来。 (5) as soon as/once/directly/the instant等引导的时间状语从句 as soon as 是最常见的表示“一……就”的从属连词，其他连词还有once，directly，immediately，instantly，the instant (that)，the minute(that) ，the moment(that)等，它们通常都可与as soon as换用。如： As soon as we got home, the telephone rang. 我们一到家，电话就响了。 I recognized her immediately I saw her. 我一看见她就认出她来了。 (6) hardly...when/no sooner...than引导的时间状语从句
关联从属连词hardly/barely/scarcely...when和no sooner...than的意思是“刚……就”，它们所引导的从句中的谓语动词通常为过去完成时。如： He had no sooner arrived home than he was asked to start on another journey. 他刚一到家，就又要他出另一次差。 No sooner had the words been spoken than he realized that he should have remained silent. 这些话刚一出口，他就意识到自己应该保持沉默。 (7) since引导的时间状语从句 在含有since引导的时间状语从句的复合句中，从句的谓语动词通常为一般过去时，主句的谓语动词通常为现在完成时、过去完成时和一般现在时，如： We‟ve never met since we graduated from the college. 大学毕业后我们就再没见过面。 Great changes have taken place since you left. 你走了以后，这里发生了巨大变化。 (8) till/until引导的时间状语从句 till和until同义，作“直到……时(为止)”解，till多用于非正式文体，until多用于句首。如： Donald will remain in college until(till) he finishes his Ph.D course. 唐纳德将留在学校直到完成他的博士学位课程。 I won‟t go with you until(till) I finished my homework. 等我做完作业我才和你一起去。 (9) whenever/each time/every time引导的时间状语从句 whenever在引导时间状语从句时作“每当；每次”解，each time和every time与whenever同义，通常可以与它换用。如： The roof leaks whenever it rains. 每逢下雨屋顶就漏雨。 Whenever/ Every time/ Each time I met her, she was studying. 我每次看见她时，她总是在学习。 2. 地点状语从句
(1) ｗｈｅｒｅ 引导的地点状语从句 从属连词where“在（或到）……的地方” Where there is a will, there is a way. 有志者事竟成。 Put it where you found it. 把它放在原来的地方。 ① where 在地点状语从句中，除指地点外，还可指处境等。如： He said he was happy where he was. 他说他对自己的处境很满意。 It‟s your fault that she is where she is. 她今天落到这个地步都怪你。 ② 有时地点状语从句中的某些词可以省略。如： Fill in the blanks with the given phrases. Change the form where necessary. 用所给的短语填空，必要的地方可以改变其形式。 Avoid structure of this kind where possible. 只要可能，就要避免这种结构。 (2) wherever引导的地点状语从句
从属连词wherever“在（或到）……的各个地方”： You can go wherever(anywhere) you like these days. 这些天你可以去你想去的地方。 Ｗｈｅｒｅｖｅｒ(Everywhere) they went, the experts were warmly welcomed. 专家每到一处， 都受到热烈的欢迎。 Sit down wherever you like. 你喜欢坐哪儿就坐哪儿。 3. 原因状语从句 (1) because引导的原因状语从句 because表示人们不知道的直接的原因或理由，着重点在从句，其所引导的从句，为全句句意的中心所在。通常用于回答why引出的疑问句，语气最强，除特别强调外，该从句一般位于主句后面。 I didn‟t go ａｂｒｏａｄ with her because I couldn‟t afford it.
我没有和她一起出国是因为费用太高。 Don‟t scamp your work because you are pressed for time. 不要因为时间仓促而马马虎虎。 (2) as引导的原因状语从句 as引导的原因状语从句所传递的通常是已知信息，从句多位于主句之前，通常可以和since换用。如： As I didn‟t know the way，I asked a policeman. 我不认识路，因而问警察。 As it is snowing, we shall not climb the mountain. 由于在下雪，我们不去爬山了。 (3) since引导的原因状语从句 since引导的原因状语从句所传递的通常是已知信息，从句多位于主句之前，通常可以和as换用。如： Since traveling by air is much faster,they decided to take a plane. 既然乘飞机旅行快得多，他们就决定坐飞机。 Since you won‟t help me ，I‟ll ask someone else.
你既然不帮我，那我就请别人帮忙。 4. 目的状语从句
(1) in order that引导的目的状语从句 in order that“为了；以便”。多用于正式文体，通常可以与so that换用。如： You stopped at Hangzhou in order that they could go around West Lake. 他们在杭州停了下来，以便游览西湖。 The expert spoke slowly in order that everyone should understand. 专家讲得很慢，以便人人听得懂。 (2) so (that)引导的目的状语从句 so that“为了；以便”。so that通常可以与in order that换用，它所引导的目的状语从句总是放在主句之后，在非正式文体中，常省略that。如： Speak clearly so that they may understand you. 你要讲得清楚，他们才听得懂。 She wanted tea ready at seven so she could be out by eight. 她要七点钟备好茶点，这样她八点以前就可以出门了。
５. 结果状语从句 (1) so that引导的结果状语从句 ① so that引导的结果状语从句只能位于主句之后，中间可以有逗号。如： Suddenly it began to rain heavily，so that it was almost impossible to carry on driving.
