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1、状语从句状语从句可以根据其可以根据其用途用途分为：分为：时间时间状语从句、状语从句、地点地点状语从句、状语从句、原因原因状状语从句、语从句、结果结果状语从句、状语从句、目的目的状语从句、状语从句、条件条件状语从句、状语从句、让步让步状语从句状语从句初中初中阶阶段常段常见见状状语语从句用法从句用法见见下表：下表：时间状语从句when/while/as，before，after，since，until，as soon asShe was cooking when someone knocked at the door.I didnt go to bed until she came back.Il
2、l come to see you as soon as I arrive there.条件状语从句if，as long as，unlessIll go to see you if I have time.They will have a picnic unless it rains next Sunday.原因状语从句because，since，as，forHe didnt catch the first bus because he got up too late.We should study hard since we are students.目的状语从句so that，in ord
3、er thatPlease say it in a loud voice so that everyone can hear it.结果状语从句so that，sothat/such thatIts so hot that we want to go swimming.It is such a heavy box that nobody can move it away.让步状语从句though/although，even if，whenever，whateverThough he looks weak，he is healthy.比较状语从句than，asas，not as/soasHe r
4、an as fast as Mike.地点状语从句where，whereverSit wherever you like.注意：注意：1在条件和在条件和时间时间状状语语从句中从句中应应用一般用一般现现在在时态时态表示将来。表示将来。2though与与but；because与与so不能用在同一个句子中。不能用在同一个句子中。3while引引导时间导时间状状语语从句从句时时，从句中的从句中的谓语动词谓语动词必必须须是是延延续续性性动词动词。4tooto与与sothat与与enough to do sth.之之间间可互可互换换。5if条件从句可与条件从句可与“祈使句祈使句and/or”互互换换。如：
5、。如：If we dont hurry，well miss the train.Hurry up，or well miss the train.【例例1】Mark isnt coming to the concert _ D _ he has got too much work to do.Aso Buntil Calthough Dbecause点拨：点拨：“太多工作要做太多工作要做”是是“没有来音乐会没有来音乐会”的原因。的原因。whenbeforeas soon asnotuntilIfunless常见的使用常见的使用“主将从现主将从现”原则的连词有：原则的连词有：表表 示示 时时 间间
6、 的的 when,while,after,before,until,till,whenever,as soon as,as long as,once 等；等；表示条件的表示条件的if(如果如果),unless,so long as,in case等。等。if 有有两两个个意意思思，作作“是是否否”讲讲时时，引引导导宾宾语语从从句句，意意同同whether，从从句句的的时时态态由由事事实实决决定定；作作“假假如如，如如果果”讲讲时时，引引导导条条件件状状语语从从句句，此此时时若若主主句句为为将将来来时时、祈祈使使句句或或有有情情态态动词动词时，从句用一般现在时时，从句用一般现在时Whenheca
7、mein,Iwascooking.他进来时，我在做饭。他进来时，我在做饭。HecameinwhileIwascooking.She sang as she worked.一边一边一边一边When+短暂性动词（短暂性动词（常常+一般过去时一般过去时）While+持续性动词（持续性动词（常常+过去进行时过去进行时）As动作衔接紧密，动作衔接紧密，表表“伴随伴随”1.when,while,as “当当时时”while的其他含义：的其他含义：While I was walking down the street,I cameacrossanoldfriend.(while=_)Helikespopmu
8、sic,whileIamfondoffolkmusic.(while=_)whenbut2.before在在前前ItwillbehalfayearbeforeIcomeback.Ihadfinishedmyhomeworkbeforemyfathercameback.After在在之后之后AfterIhadfinishedmyhomework,myfathercameback.3.since“自从”（常用于现在完成时，其引导的从句常用过去时。）从他离开后我们没见过面。We havent seen each other since he left.4.as soon as”一就”我一回来就给你打
9、电话。Ill call you as soon as I come back.主将主将 从现从现5.notuntil“直到才”我将不会离开直到他回来。I will not leave until he comes back.主将 从现I did not leave until he came back.1._hecomesheretomorrow,Iwillcallyou.2._hewaswalkinginthestreet,hemetTim.3.Shesang_sheworked.WhenWhile/Whenas4.I ll ring you up _I get to Beijing.as
10、soon as5.Itwontbelong_hefinisheshiswriting.6._hehadfinishedhiswork,heleftthere.7.Itistwoyears_hecamehere.8._shetoldme,Ihadnoideaofwhattheyhadsaid.beforeAftersinceUntil二二.地点状语从句地点状语从句地点状语从句由地点状语从句由where,wherever等引导。等引导。例如：例如：Wherethereisawill,thereisaway.Youcantakeawalkwherever you like to.三三 原因状语从句原
11、因状语从句 通常由通常由because,since,as,for 引导引导 所表示的语气由所表示的语气由becausesinceasfor逐渐减弱。逐渐减弱。because表直接原因表直接原因,有很强的因果关系有很强的因果关系,回答回答 “why”的的提问，提问，since表很明显的原因表很明显的原因,“既然既然”常放句首，常放句首，asas表表明显原因，语气较弱。明显原因，语气较弱。for放句中，补充说明原因。放句中，补充说明原因。Eg:-Why are you late?-Because my car is broken.Since you cant answer this questio
12、n,I will call others.As its raining,we should stay here.You cant see the teacher,for he isnt in.1._hewasill,hedidntgotoschool.2._youdonotunderstand,Iwillexplainagain.3._shewaslateforclass,shehadtosaysorry.4.Hemustbeill,_heisabsenttoday.BecauseSinceforAs5.I eat potatoes _I like them.我吃土豆是因为我喜欢土豆。6._I
13、 didnt know the way,I asked a policeman.我由于不知道路，因而问警察。7._you wont help me,Ill ask someone else.你既然不帮我，那我就请别人帮我。becauseAsSincebecause of和because的区别 because of后加名词代词或动名词，不加句子，而because加句子，例：Because of his illness,he didnt go to work.因为生病，他没上班。Because he was ill,he didnt go to work.连接词：连接词：if,unlessIf I
14、 have a lot of money,I will buy a big house.主将从现主将从现四四条件状语从句条件状语从句 如果如果 除非除非The sports meeting will continue,unless it rains tomorrow.1._ you touch an English person,you should say“sorry”.If2.Dont touch anything _ your teacher tells you to.unlesswhenbeforeas soon asnotuntilIfunlessso that/in order t
15、hat引导目的状语从句,从句中常用情态动词may(might)/can(could)/should.Eg:我提高声音以便每个人都能听见我。I raised my voice so that everyone could hear me.我起床早是为了能赶上早班车。I got up early so that I could catch up the early bus.1.Theysetoutearly_theymightarrivethereintime.2.Id like to arrive 20 minutes early_Icanhavetimeforacupoftea.A.assoo
16、nasB.asaresultC.incaseD.sothatsothat(inorderthat)sothat/suchthatsothat/suchthatEg:他是如此的兴奋以至于说不出一个字。他是如此的兴奋以至于说不出一个字。He was so excited that he couldnt say a word.他讲了一个如此有趣的故事，以至于我们忘他讲了一个如此有趣的故事，以至于我们忘了时间。了时间。She told us such an interesting story that we all forgot the time.当当n.前有前有many或或much修饰时，用修饰时，
17、用so而不用而不用such。sothat的的so后面后面跟形容词或副词跟形容词或副词;such 在主句中修在主句中修饰名词饰名词1.Itis_goodastorythatIllneverforgetit.2.It is _ a good story that Illneverforgetit.sosuch 七七.让步状语从句让步状语从句让步状语从句，表示“虽然，尽管，即使”等概念，常用的关联词有：though,although,even though等。他虽然有病，但仍然继续工作。Though he was ill,he was still working.此事虽难，但我们还是要做。Altho
18、ugh it is difficult,we shall do it.即使你这样说，我也不信。Even though you say so,I do not believe it.though和although可以互换，只是although比较正式。though不可以与连词but连用，但可以与yet，still连用，例：虽然他很努力，但还是没通过考试。Though he worked hard,he couldnt pass the exam.1._heisold,heworkshard.2._yousayso,Idontbelieveit.Although/ThoughEventhough比
19、较状语从句常用than或asas引导。than表示两者的比较，asas表示程度相同我比TOM高。Im taller than Tom他和我跑得一样快。He runs as fast as I is do1.Hedoesntworkashard_youdo.2.Shedidworseinthetest_sheexpected.asthan九九.方式状语从句方式状语从句方式状语从句由方式状语从句由as引导。引导。eg:DoasRomansdo.入乡随俗入乡随俗如我告诉你那样做。如我告诉你那样做。DoasItoldyou.按你喜欢的方式去做。按你喜欢的方式去做。Doasyoulike.（）1.Ifh
20、e_hardernexttime,hewillcatchupwithus.A.workB.workedC.worksD.willwork（）2.IthinkWeiHuawillbeveryhappywhenshe_yourpresents.A.looksB.willlookC.receivesD.willreceiveCC Exercise（）3.Wellsetoutassoonasourmonitor_.A.comeB.comesC.willcomeD.hascome（）4.Illgowithyouifit_finetomorrow.A.hasbeen B.isC.willbeD.be（）5
21、.Illmeethimatthestationwhenhe_.A.willreturnB.returnC.returnsD.returned（）6.Iwontgotoseethefilmtonight,becauseI_myticket.A.lostB.havelostC.willlostD.didnthaveBBCB（）7.Areyougoingtovisitthefarmtomorrow?Yes.Butifit_,wellstayatschool.A.rainB.rainedC.rainsD.willrain（）8.Pleasedontstandupinclassuntilyou_.A.w
22、eretoldtoB.aretoldtoC.weretoldD.aretold（）9.Theywontbebackuntilthework_.A.doB.doesC.isdoneD.willdo（）10.XiaoMingwillcomeandplaywithmeifhe_busy.A.isB.wontbeC.isntD.willbeBCCC（）11.IwillletyouknowaboutitassoonasI_thenews.A.willgetB.getC.gotD.get（）12.Thoughheisill,_heisstillworkinghard.A.butB.yetC.tooD.either（）13.Hewaslate_theheavyrain.A.becauseB.becauseofC.thoughD.if（）14.Theboyis_lovelythatwealllikehim.A.soB.suchC.tooD.veryBADB（）15.Thisis_aninterestingbookthatIwanttoreaditagain.A.soB.suchC.quiteD.very（）16.Hegotupearly_hecouldcatchupwiththeothers.A.inordertoB.ToC.sothatD.thatCB