2024中考英语二轮复习状语从句综合复习及练习

PAGEPAGE21状语从句状语从句考点讲解以及针对性训练（时间，条件，缘由，地点，结果，比较，让步，目的状语从句的用法）时间状语从句【经典剖析】时间状语从句用一般现在时表示将来。连接时间状语从句的连接词有：when(当……的时候)，while（当……的时候），as(当……的时候)，once(一旦)，till(until)（始终到……，直到……才），bythetime(到……时)，assoonas（一……就）themoment(一……就)．since(自从……)．before(在……前)．after(左……后)2．when，while，as均可表示“当……的时候”。when强调“特定时间”，表示主句谓语动词的动作与从句谓语动词的动作是同时发生的，或从句的动作发生在主句的动作之前；while表示的时间是一段，而不是一点，as多用在口语中，强调“同一时间”或“一前一后”，有时还有“随着”的含义。I'llgoonwiththeworkwhen／comebacktomorrow．我明天回来后会接着做我的工作。Whenspringcame,hefeltlikeatrip.春天来了，他想去旅游。Whenhewaseatinghisbreakfast,heheardthedoorbellring.(强调吃饭的时候）。Whilehewaseatinghisbreakfast,heheardthedoorbellring.（强调吃饭的过程中）WhileIwasstudying,youfellasleep.当我学习的时候，你睡着了。Justashewasspeaking,therewasaloudexplosion.正值他要说话时，传来很大的爆炸声。AsIwasgoingout,itbegantorain.（强调两个动作先后发生）Asspringwarmsthegoodearth，allflowersbegintobloom．(as有“随着”的含义)3．till／until，表示“始终到……”，主从句都用确定式；表示“直到……才”，主句否定，从句确定。Heworkeduntilitwasdark.他始终工作到天黑。Hedidnotgetuptillhismothercamein.始终到母亲进来他才起床。4．once“一旦”，bythetime“到……时”。Onceyouseeher,youwillfindwhatIsaidistrue.一旦你见到她就会发觉我说的是对的。Once(itis）published,thisbookwillbeverypopular.一旦出版，这本书会大受欢迎。bythetime+现在时，主句用将来完成时。Bythetimehearrives,wewillalreadyhavelefthere.等他到达时，我们将已离开这儿了。bythetime+一般过去时，主句用过去完成时。Bythetimehearrived,wehadalreadylefthere.他到达的时候我们早已离开这儿了。5．assoonas，themoment表示从句动作一发生，主句动作随即发生，通常译为“一……就”。AssoonasIfinishthework,I'llgotoseeyou.我一完成工作就会来看你。IshallcomeassoonasI'vefinishedmysupper.我一吃完晚饭就来。Shecametothescenethemomentsheheardthenews.她一听到消息就来到现场。6．since“自从”，before“在……前”，after“在……后”，Itwasnotlongbefore意为“不久”。since引导从句用非持续性动词或“过去时间点”或“过去时间段+ago”，主句用完成时态。Sincehegraduated,hehasworkedinthiscity.他毕业后始终在这个城市工作。Ihaven'tseenhimsincelastyear/threeyearsago.去年以来/3年来，我没见过他。Hehandedinhispaperbeforethebellrang.他在铃响前交了卷子。Itwasnotlongbeforehecameback.不久他就回来了。IwrotebacktohimthreedaysafterIgothisletter.我接到他信3天后就给他回信了。针对性练习1．选择正确的表述方法：Istay/I’llstayhereuntilyou'llcome/youcomeback.I'mgoingtobedwhenIfinish/I'llfinishmywork.Wemustdosomethingbeforeit's/itwillbetoolate.Juliaisgoingawaysoon.I'm/I'llbeverysadwhensheleaves/she'llleave.Don'tgooutyet.Waituntiltherainstops/therainwillstop.Wecome/We'llcomeandvisityouwhenwe're/we'llbeinShanghaiagain.WhenIcome/I'llcometoseeyoutomorrow,Ibring/I'llbringthebook.I'mgoingtoBeijingnextweek.IhopetoseesomefriendsofminewhileI'm/I'llbethere.2．选择最佳答案 hewaslisteningtothemusic,Johnfellasleep.A.After Howdidyoutrytogettoschoolontime A.when B.how C.why D.that hewashitbyacarthismorning. B.when C.as D.so Lucyknewnothingaboutit hersistertoldher. B.until C.if D.since crossthestreet thetrafficlightsturnedA.not;when B.don't;before C.notto;until D.notto;since6)ThebookwassointerestingthathehadreaditforthreehoursA.when B.after C.until D.before wehadseenalltheanimals,wewenthome.A.Then B.After C.Though A.before B.after C.since D.until —Howlonghastheweatherbeenlikethis?A.Untillastnight B.Eversincelastnight D.Twodayslater .A.sincealmostayear B.fromalmostayearonC.afteralmostayear D.sincealmostayearago Hewassotiredthathefellasleep hewenttobed.A.asif B.eventhough C.eversince D.assoonas Iknewnothingabouttheaccident myfriendtoldmeyesterday. B.since C.until D.after Ididn'tmanagetodoit A.until B.since C.while D.after【Keys】1.1)I'llstay;youcome2)Ifinish3)it's4)I'llbe;sheleaves5)therainstops6) We'llcome;we're7)Icome;I'llbring8)I'm2.1)C2)A3)B4)B5)A6)D7) B8)C9)B10)D11)D12)C13)A缘由状语从句和地点状语从句【经典剖析】1．缘由状语从句引导缘由状语从句的连词有：because,for,since,as,nowthat1)because意为“因为”，表示干脆的缘由或理由，着重点在从句，用于回答why，语气最强。Heisabsenttodaybecauseheisill.他今日缺席，因为他病了。Ididn'tgooutbecauseIwasbusywithhomework.我没有出去，因为我忙于家庭作业。有时，可用becauseof后接名词或代词表示缘由，此时becauseof=for(介词)。Wewon'tbeabletocomebecauseoftheweather.由于天气的缘由，我们来不了。Shewaslookingallthebetterforherstayinhospital.她因为待在医院，显得好多了。2)for意为“因为”，引导的从句并不说明主句行为发生的干脆缘由，只供应补充说明，且不行位于主句前。for前往往用逗号或分号与主句分开，引起的从句对主句加以说明。Ididn'tgotoseehim,foraheavysnowwasfalling.我没有去看他，因为在下大雪。Thedayswereshort,foritwasnowDecember.白天短了，因为现在已经是十二月了。Wemustbeginplanningnow,forthefuturemaybringunexpectedchanges.我们必需现在就起先筹划，因为将来可能会发生意想不到的改变。有时，for引起的从句并不表示缘由，而是表示一种推断或说明，而because则不能。Someoneinthehousemustbeill,foradoctorhasjustcomeout.房子里确定有人病了，因为有个医生刚刚出来。3)since意为“既然”、“由于”，一般表示对方已知的、无需加以说明的既成事实的理由(假如从句表示的缘由不是确定的事实，就不能用since，通常用because)。Sinceyouaregoing,Iwillgotoo.既然你要走，我也走了。Sinceyouareill,I'llgoalone.由于你病了，我就一个人走了。4)as意为“由于”，表示非常明显的缘由，一般说明因果关系，着重点在主句，语气较弱。Asitissnowing,weshallnotgotothepark.由于正在下雪，我们就不去公园了。Hehadtoapologize,asheknewhehadmadeamistake.他必需致歉，因为他知道他错了。由as表示的缘由语势最弱，常用于口语。5)nowthat意为“既然”，有时可将that省去，含义与since接近。区分在于：since表示原先已存在的状况，而nowthat表示现在才发生的状况。Nowthatithasstoppedraining,let'sstartatonce.既然现在雨停了，咱们立刻起先吧！Nowthatyouhavecome,youmayaswellstay.既然来了，你最好还是待在这儿。2．地点状语从句引导地点状语从句的连词有：where,wherever,anywhere,everywherePutitwhereyoucanseeit.把它放在你看得见的地方。I'llfindhim,whereverheis.不管他在哪里我都要找到他。Youshouldputthebookwhereitwas.你应当把书放在原来的地方。Whereveryougo,youshoulddoyourworkwell.不论你到哪里都要把工作做好。Youcan’tcampanywhere/where/whereveryoulike.你不能想在哪里安营就在哪里安营。针对性练习参按例句，用所给的缘由状语从句连词将方框1和方框2内的句子连成状语从句：a.hecanlearntodriveb.youcantravelc.theyhadnomoneyd.thestreetswerecoveredwithe.allthecakeslookedgoodf.hedidquitewellintheexamg.Ihadtoaskforhelp例句:Sinceallthecakeslookedgood,shecouldn'tdecidewhichtochoose. 3) (as) (Nowthat)2.指出以下由as连接的句子是缘由状语从句还是时间状语从句：Asitwaspublicholiday,alltheshopswereshut. Iwatchedherassheopenedtheletter. Canyouturnoffthelightasyougoout,please? Astheylivenear,weseethemquiteoften. Astheywalkedalongthestreet,theylookedintheshopwindows. 3.选择最佳答案1)IhopetogotoFrancesomeday therearemanyfamousmuseumsthere.A.though B.unless D.where —Wouldyouliketogototheconcertwithme?—I'dloveto, Ican't. Ihavealotofhomeworktodo.A.and;BecauseB.but;Because C.so;And D.and;so Jimhasbeeninthefactoryfortwoyears____________A.when B.since C.assoonas D.whether Jackwasverytired heplayedtennisallafternoon.A.if B.assoonas D.before You'dbettercomebackearlier itisgettingcolder.A.as B.and C.but D.or Janeworearaincoat itwasraining.A.so B.but C.however D.because TheItalianboywasregardedasahero hegavehislifeforhiscountry. B.becauseof C.onaccountof D.because【Keys】1.1)Shewalkedcarefullybecausethestreetswerecoveredwithice.2)Asheisnow17yearsoldhecanlearntodrive. 3)IhadtoaskforhelpasIhadnoideahowitworked.4)Becausehedidquitewellintheexam,hisparentspraisedhim.5)Sincetheyhadnomoney,theycouldn'tbuyit.6)Nowthatyouarewellagain,youcantravel.2. l)缘由状语从句2)时间状语从句3)时间状语从句4)缘由状语从句5)缘由状语从句6)时间状语从句3. 1)C2)B3)B4)C5)A6)D7)D条件状语从句【经典剖析】1．条件状语从句用一般现在时表示将来。引导条件状语从句的连词有：if假如；unless除非，假如不；onconditionthat条件是；aslongas只要2．表示正面的条件用if“假如”。Ifyoudon'tlookafteryoungtrees,theywilldieveryquickly.假如你不好好照看小树苗，它们就会很快死去。Ifthemuseumchargesforentry,alotofpeoplewon'tbeabletovisitit.假如进入博物馆要收费，很多人就参观不成了。3．表示否定的条件用unless(=if.．．not)“除非，假如不”。IshallnotgotothecinemaunlessIfinishmyhomeworkbeforeeight.我不会去看电影，除非我能在8点前完成作业。说明：if…not常可以用unless替代。Ifyoudon’tstudyhard,youwillfailintheexam.Youwillfailintheexamunlessyoustudyhard.4．表示使某事成为现实必要的条件用onconditionthat“条件是”，aslongas‘‘只要”。Youmaygoswimmingonconditionthatyoudon'tswimtoofarawayfromtheriverbank.你可以去游泳，条件是你不能游得离河岸太远。Aslongasyoukeepontrying,youwillsurelysucceed.只要你接着尝试就确定能胜利。因此，我们不能说：Aslongasyoudon'tstudyhard,youwillfailintheexam.5．祈使结构表条件。前半部分的祈使结构相当于if条件句，可用动词或名词开头；后半部分的简洁句常用一般将来时，有时也用一般现在时。此句型与条件状语从句形成同义结构。1)祈使句(,)+and/then+简洁句＝>if从句(否定式)+主句Givemesomewheretostand,andIwillmovetheearth.（假如）给我一个支点，我便能掀动地球。=Ifyougivemesomewheretostand,Iwillmovetheearth.Onemoreword,andI'llturnyouout.你再多说一句，我就把你赶出去。=Ifyouspeakonemoreword,Iwillturnyouout.Useyourhead,thenyou'llfindaway.动动脑子你就能找到方法。=Ifyouuseyourhead,you'llfindaway.2)祈使句（,）+or+简洁句＝>if从句(否定式)+主语Workevenharder,oryouwillneverpasstheexam.假如不加倍努力，你就恒久无法通过考试。=Ifyoudon'tworkharder,youwillneverpasstheexam.Stoptellinglies,oryouwillbepunished.假如你接着说谎，就会受到惩处。=Ifyoudon'tstoptellinglies,youwillbepunished.针对性练习1．参按例句，用连词if将方框1和2内的句子连成条件状语从句：1 2IIf+youdon'thurryyouwantthosepictures++you'llbelateI'llthrowitawaywecantalklater例句:Ifyoudon'thurry,you'llbelate. 2. 用unless完成下列句子： Youmustworkmuchharderoryouwon'tpasstheexam. . Listencarefullyoryouwon'tknowwhattodo. . ShemustapologizetomeorI'llneverspeaktoheragain.I'llneverspeaktoheragain Youhavetospeakveryslowlyorhewon'tbeabletounderstandyou.Hewon'tbeabletounderstandyou . ThecompanymustoffermemoremoneyorI'mgoingtolookforanotherjob.I'mgoingtolookforanotherjob .3．选择最佳答案填空： —Wouldyouliketogototheparkwithme,Susan?

—I'dliketo, youdon'twanttogoalone.A.until B.before C.if D.after Tomorrowwe'llgotothecitypark itissunny.A.assoonas B.when C.if D.as A.while B.if C.but D.or youworkhardonit.A.if B.unless C.when D.but itrainsthisafternoon.A.if B.since C.assoonas D.unless【Keys】1.1)Ifyoufailtheexam,youcandoitagain.2)Ifyoudon'twantthismagazine,I'llthrowitaway.3)Ifyouwantthosepictures,youcanhavethem.4)Ifyou'rebusynow,wecantalklater.5)Ifyou'rehungry,wecanhavelunchnow.6)Ifyouneedmoney,Icanlendyousome.2.1)unlessyouworkmuchharder2)unlessyoulistencarefully3)unlesssheapologizestome4)unlessyouspeakveryslowly5)unlessthecompanyoffersmemoremoney3.1)C2)C3)B4)B5)D让步状语从句【经典剖析】1．引导让步状语从句的连词有：although,while,eventhough,evenif,whether...(ornot),用nomatter十wh-/how引导2．although／though“虽然”。AlthoughIdidn’tknowanybodyattheparty,Ihadaverygoodtime.虽然晚会上的客人我一个也不相识，但我玩得很开心。[留意]“although…but”是个典型的错误，因为but是并列连词，不能与从属连词although连用。但是，although可与yet，still连用，因为yet，still是副词，它可使前后关系更明确。3．while意为“然而”。1)while用于比照，说明两种状况相反，意为“然而，但是”。Tomisveryoutgoing,whileJaneisshyandquiet.汤姆性特别向，而简却害羞宁静。WhileIwasreading,hewasplaying.我在读书，而他在玩。2)while意为“虽然，尽管”，同although，此时从句和主句的主语往往为同一人或物。Whileshelikedcats。sheneverletthemcomeintoherroom．虽然她喜爱猫，但她从不让猫进她的房间。4．evenif“即使”（if后陈述的是假设）；eventhough“尽管”（though后陈述的是事实）。I'mgoingtoapplyforthejob,evenifitpaysverylittle.即使酬劳不高，我也要去申请那份工作。Heisanhonestman,Isay,eventhoughIhaveopposedhim.我说他是个诚恳的人，尽管我反对过他。5．whether…(ornot)“无论是……或是……”.Whetheritrainsornot,Ishallgooutforanouting.无论是否下雨，我都要外出游玩。Whetherwewinorlose,wearegoingtodoourbest.无论胜败，我们都会尽最大努力。[留意]whether作“无论”解，用现在时表将来；whether作“是否”解时则不能。They'llgooutwhetheritrainsornottomorrow.无论明天是否下雨，他们都要出去。Canyoutellmewhetheritwillrainornottomorrow?你能告知我明天是否下雨吗？6．用nomatter+wh-／how的词引导，意为“无论”。nomatterwho无论谁，nomatterwhich无论哪一，nomatterwhat无论什么,nomatterwhen无论何时，nomatterwhere无论哪里，nomatterhow无论怎样Nomatterwhoyouare,youmustobeythelaw.无论你是谁，你都应当遵纪遵守法律。Nomatterwhereyouare,youmustrememberyouareaLeaguemember.无论你在哪里，你都应当记住你是一个团员。Ithasthesameresultnomatterwhichwayyoudoit.无论用什么方法来做，结果都一样。Nomatterwhathappens,we'llneverloseheart.不管发生什么，我们恒久不会灰心。Youcanalwaysfindhimworkingatthedesknomatterwhenyougotoseehim.无论什么时候你去看他，总会发觉他坐在桌边工作。Nomatterhowcolditis,sheoftengoesswimming.无论有多冷，她总是常去游泳。针对性练习1．参按例句，用连词although将方框1和方框2内的句子连成让步状语从句：1hehasaveryimportantjobIhadneverseenherbeforeitrainedalotIdidn'tspeakthelanguagewe'veknowneachotherforalongtime2we'renotgoodfriendsheisn'tparticularlywell-paidIrecognizedherfromaphotographshewasn'twearingacoat 2．选择最佳答案填空 he'sold,hecanstillcarrythisheavybag.A.Though B.Since C.For D.So —Howdoyouliketheconcertgivenbythe"FoxyLadies"?— Exciting, onepieceofthemusicwasn'tplayedquitewell.A.so B.though D.and —Shallwegoonworking?— Iprefertohavearest.A.when B.if D.though DoctorLiwenttoseethepatient itwasrainingheavily. B.and C.since D.though —Thisdresswaslastyear'sstyle.— Ithinkitstilllooksperfect ithasgoneoutthisyear.A.sothat B.eventhough C.asif D.eversince Nomatter busyheis,hewon'tgiveuphishobby.A.where B.how C.what D.who Ineverseemtoloseanyweight, hardItry.A.eventhoughB.nomatterhowC.asif D.eversince Nomatter youcome,youarewelcome.A.how B.where C.when D.what Thoughit'sraining, arestillworkinginthefields.A.they B.butthey C.andthey D.sothey whathesaid.A.eventhoughB.inspite C.nomatter D.contraryto whatmayhappen,Iwon'tchangemymind.A.Evenif C.Perhaps D.Nomatter【Keys】 1)Ihadneverseenherbefore,Irecognizeditrainedalot,weenjoyedourholidaymakemyselfunderstoodwe'veknowneachotherforalongtime,we'renotgoodfriends 1)A2)B3)D4)D5)B6)BB8)C9)A10)C11)D目的、结果、比较状语从句【经典剖析】1．引导目的状语从句的连词有：inorderthat目的是为了，sothat，以便以inorderthat，sothat引导的目的状语从句谓语通常用may，might加动词构成，也可用can/could或will／would加动词构成。Heworkshardinorderthathecanservehiscountrywell.他努力工作，目的是为了能更好地为国家服务。Theystartedearlysothattheymightarriveintime.他们很早动身，以便按时到达。[留意]“for+动名词”不用于表目的，但“for+名词”可用于表目的。WriteitinsimpleEnglishtomake(不能用formaking)everybodyunderstand.为了能让每个人都理解，请用简洁的英语写。Bettergetupearlyfortheearlytrain.为了能赶上早班火车，请早一点起床。2．引导结果状语从句的词：sothat以致，so…that如此……以致，such…that如此……以致Hemadeawrongdecision,sothathalfofhispropertywaslost.他做了个错误的确定，以至于他丢失了一半的财产。Theboxissoheavythatnobodycanmoveit.这个箱子是如此重，（以至于）无人能移动它。Itissuchaheavyboxthatnobodycanmoveit.这个箱子如此重，（以至于）无人能移动它。[留意]sothat既可引导目的状语从句，又可引导结果状语从句，其区分在于：引导结果状语从句时通常用逗号同主句分开。3．引导比较状语从句的词有：than比，as…as“像……一样”，notso…as“不像……一样”，themore…themore“越……越”Iknowyoubetterthanhedoes.我比他更了解你。Wewalkedasfastaswecould.我们尽可能地快步行走。Theworkisnotsoeasyasyouthought.这工作没有你想的那么简洁。Nothingissopreciousashealth没有什么能像健康一样宝贵。Theharderyoustudy,thegreaterprogressyouwillmake.你越努力学习，进步就越大。针对性练习1．依据所给汉语，完成下列句子（每个空格填入一个英语单词）：1)为了能准时到他很早动身。Heleftearlyhemightarriveontime.2)我来把这件衬衫洗了，你明天能穿。I'llwashthisshirtyoucanweartomorrow.3)他气得说不出话来。Shewasangryshecouldn'tspeak．4)杰克有那么多挚友，他记不全他们的名字了。Jackhasmanyfriendshecan'trememberalloftheirnames.5)他走得那么急，书也忘了拿。Heleftinahurryheforgottobringhisbooks.2．选择最佳答案填空： I'llleavehimanote he'llknowwhereweare.A.sothat B.soas C.inorder D.for Thequestionwas .A.very;them B.very;it C.so;them D.so;it boythatwealllikehim. D.suchgooda Theywere theycouldn'tgototherestaurantwithus.A.so;that B.such;as C.very;that D.enough;as Itwas thathehadtoaskforhelp. B.sodifficultawork D.suchadifficultjob Hestartedearly hecouldgettherebeforenine.A.inorderthat C.soasto D.inorderto Robertisgoodatlanguages, B.for C.as D.since it'sgoingtorain.A.that B.as C.asif D.that【Keys】 1)inorderthat2)sothat3)so...that4)so...that5)such...that 1)A2)D3)B4)A5)D6)A7)C8)C 2. A./ B.as 4. B.soon 5. B.onthepointof;while D.onthepointof;as6. Mostofhisgreatnovelsandplayswerenotpublishedorknowntothepublictragic(悲剧)deathin1786. B.eversince 7. . ,Ihavetoputitawayandfocus(集中)myattentiononstudythisweek. A.if B.while D.When Babiessleep16to18hoursinevery24hours,andtheysleeplessder. D.if D.Tocheck A.evenif C.asif -Yes.Igaveittohim Isawhim.A.onceB.while

C.ifD.themoment B.incase —MayIgonow?— A.After D.Assoonas B.When;inC.That;in 19. Heseemedtohavebeenasleep,soIsaidnothing,butsathewouldseeme A.whether;when B.that;whenC.which;where D.where;when20. Itwillbefiveyears wemeetagain.A.since B.untilC.before D.when 21. Neverloseheart difficultyyoumaymeetwith.A.what B.whateverC.how D.however22. weareallowed ,wecan'tdrinkanybeer.A.Aslongas;todo B.If;toC.Unless;to D.Onconditionthat;doingso23. Youcanstillfindbonesofthebirds theyusedtolive.A.inwhich B.intheplaceC.where D.that24. Howcantheylearnanything theyspendalltheirsparetimewatchingTV?A.where B.whenC.while D.but25. Iadmitthatthereareproblems,Idon'tagreethattheycannotbesolved.A.While B.IfC.As D.Unless26. " myfeetremainstandingabovethewaterlevel,thereishope..."saidthecaptain.A.Where B.EvenifC.While D.Although27. Youwillstayhealthy youdomoreexercise,suchasrunningandwalking.A.if B.howC.before D.where28. —Shallwegoonworking?

—Yes, Iprefertohavearest.A.when B.ifC.because D.though A.when B.until 30. —Ihopeyou'llenjoyyourtrip,dear!—Thankyou,mum.I'llgiveyouacall B.assoonas II.Rewritethesentence.31. Thewaterwassodirtythatwecouldn'tdrinkit.(保持句意不变)

Putonyourcoat,oryou'llcatchacold.(保持句意不变) putonyourcoat,you'llcatchacold.Theicecreamwillmelt,soyou'dbetterputitinthefridgeatonce.(保持句意不变) Youwillfailthetestagainifyoudon'tstudyhard.(保持句意不变) Theboysstoppedplayingbasketballwhenitwasdark.(保持句意不变) Thestudentspracticesingingeverydayinordertowintheconcert.(保持句意不变) 【答案与解析】1．答案：A解析：因为gave后面已经有表示物的干脆宾语了，解除代词A、C、和D。however意为“无论如何”；whenever意为“每当……”，依据句意，只有选C，意义才通。2．答案：A解析：因为前面已经连词though了，所以不再须要连词了。Hard-workingthoughhewas=Althoughhewashard-working。3．答案：B解析：因为as引导让步状语从句，要求将从句的表语或状语等放到句首。而although，while表示让步时，都用正常语序；另外，though引导的让步状语从句，其表语或状语等可提前也可不提前。4．答案：C解析：因为immediately，instantly，directly和themoment，theinstant，theminute等都可以用作连词，引导时间状语从句，相当于assoonas。5．答案：C解析：因为表示“刚要做某事时，突然又发生另一件事”的句型是：was/werejustabouttodosth．When….did…或was/werejustonthepointofdoingsth.When…did.6．答案：C解析：因为not…until…“直到……才……”，再接before语意上不通，要用after。7．答案：C解析：因为nomatter后确定要接疑问词或whether。8．答案：C．解析：引导状语从句时nomatterhow=however，其后