九年级英语复习状语从句

状语从句（一）时间状语从句1．when,while,as的区别(1)when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：Whenwewereatschool,wewenttothelibraryeveryday.(2)while，主句中的动作与从句中的动作同时发生。Pleasedon’ttalksoaloudwhileothersareworking.(3)asIsawhimashewasgettingoffthebus.2．一些表示时间的名词短语也可用来引导时间状语从句theminute,themoment,theinstant,everytime,thelasttime,everytime。如：ThefirsttimeIgottotheisland,Iwasamazedbyitsbeauty.ThemomentIenteredtheroom,Ismelledsomethingusual.EverytimeIvisithim,heisalwaysreading.directly和immediately“一……就……”，相当于themoment/theinstant和assoonas。IknewsomethingwaswrongdirectlyIarrived.Theboysdidallsortsofmischiefimmediatelymybackwasturned.4．before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。after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。Theplanehadtakenoffbeforehearrivedattheairport.Afterhehadlivedinthesouthfornearly20years,hedecidedtogotoseekhisfortuneinthenorth.nosooner...than和hardly(scarcely)．..when意为“一……就……”。主句动词用过去完成时。如果nosooner,hardly或scarcely位于句首，主句要倒装。Nosoonerhadheenteredthehousethanitbegantorain.Hehadhardlygonetobedwhenthetelephonerang.6．till和until“直到……”，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。Untiltheyhadfinishedthework,theydidnotgohome.7.It与before,since,when引导的时间状语从句连用时的区别：(1)Itis/hasbeen＋时间段＋since...自从……以来已有多长时间了。(2)Itis/was＋时间点＋when...“当……的时候，是……”。(3)Itbe＋时间段＋before...“要过多久、过了多久……才”。Howlongisitsincewemetlasttime?ItwasalreadymidnightwhenIgothome.ItwasnotlongbeforeshegotmarriedandmovedtoJapan.（二）地点状语从句地点状语从句用where,wherever引导Wherethereisawill,thereisaway.Wherevertheywent,theyreceivedawarmwelcome.（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、becauseof+名词Becauseoftherain,wedidn’tgotothepark.3、because和so不可连用，只能选其一。（另有although,but）Whydidn’thecometoschool?Becausehewasill.SinceImustdie,Imust.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。Thedaysareshort,foritisDecembernow.（四）目的状语从句目的状语从句用so（常用于口语）,that,sothat,inorderthat引导目的状语从句的谓语常含有may,might,can,could,should,would等情态动词。We’llsitnevertothefrontsowecanhearbetter.Theyhurriedtothestationinorderthattheycouldcatchthetrain.（五）条件状语从句1．if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”。Ifyou’vegotexamstomorrow,whyaren’tyoustudying？Thesportsmeetwillbegintomorrowunlessitrains.【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),aslongas,solongas,onconditionthat和incase这些连词(词组)意思相近，有“如果，只要，假如，假使，在……条件下”等意思。Supposing(that)youfailasecondtime,don’tgetdisappointed,buttryagain.Onconditionthattheliquidiscooledstillfurther,itwillturntoasolid.。3．onlyif和ifonlyonlyif引导的从句用陈述语气，意为“只要”；ifonly引导的从句要用虚拟语气，意为“但愿……”，“要是……就好了”。onlyifyouhavepersistence,canyouachievegreatsuccess.。IfonlyIhadwings,Iwouldbeabletotravelaroundtheworldeasily.（六）结果状语从句结果状语从句由such…that,so…that,sothat,that引导1.such…that的常用句型such+a/an+形容词+可数名词单数+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somany（much,few,little）+名词，suchalotof（或lotsof）+名词是惯用法。Sheissuchabeautifulgirlthatwealllikeher.Itwassuchdeliciousfoodthattheyateitup.2.so+形容词或副词+thatso+形容词+a/an+可数名词单数+thatHeissorichthathecanbuylotofthingsforhimself.Itwassohotadaythatweallwentswimming.Itwassuchagooddaythatweallwentswimming.3.sothat,that都可以引导结果状语从句Hedidn’tstudyhard,（so）thathefailedtheexam.4.too…to,enough…to可以引导结果状语从句与so…that替换Sheissoyoungthatshecan’tgotoschool./Sheistooyoungtogotoschool.Sheisn’toldenoughtogotoschool.（七）让步状语从句1．让步状语从句可由although，though，as，while，evenif(though)，whatever，whether...or...，nomatterwho(when，what...)等引导。Although/Thoughsheworksveryhard，(yet)shemakesveryslowprogress.WheneverI’munhappy(＝NomatterwhenI’munhappy)，itismyfriendwhocheersmeup.【专家提醒】however引导让步状语从句时，与它所修饰的词一起放在句首。2．as引导的让步状语从句的常见的几种倒装方式(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。Hardasyoumaytry，youwillnotsucceed.(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。Waitasyoumay，hewillnotseeyou.(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。Childasheis，hecantellrightfromwrong.3．while作“尽管”讲引导让步状语从句时往往放在句首WhileIunderstandyourviewpoint，Idon’tagreewithyou.（八）方式状语从句1．as和justas“如……；犹如……，正如……”。justas比as强调的语气更强。Intheearlydays,peoplecouldnotcountaswedonow.Mostplantsneedsunlightjustastheyneedwater.2．asif和asthoughasif或asthough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”。Itlooksasthoughitisgoingtorain.Hespokeasifhewereaphilosopher.(从句动词与主语谓语同时发生，从句谓语要用一般过去时)Hespeaksasifhehadbeentothemoon.(从句动作发生在主句谓语之前，从句谓语要用过去完成时)Hespeaksasifhewouldflytothemoon.(从句动词发生在主句谓语之后，从句谓语要用would/could/might＋do)（九）比较状语从句比较状语从句由as…as,notas（so）…as,than,the+比较级，the+比较级引导Heswimsaswellasyou.（do）/Hegothereearlierthanyou.（did）1.Itookmydrivinglicensewithmeonholiday, Iwantedtohireacar.A.incase B.evenif C.eversince D.ifonly2.Anyone,once_______positiveforH7N9fluvirus,willreceivefreemedicaltreatmentfromourgovernment.A.tobetestedB.beingtestedC.testedD.totest3.Youmustlearntoconsultyourfeelingsandyourreason________youreachanydecision.A.although B.beforeC.because D.unless4.Intheglobaleconomy,anewdrugforcancer,itisdiscovered,willcreatemanyeconomicpossibilitiesaroundtheworld.A.whateverB.whoeverC.whereverD.whichever5.Shesaysthatshe’llhavetoclosetheshop________businessimproves.A.if B.unless C.after D.when6.If_____tolookafterluggageforsomeoneelse,informthepoliceatonce.A.asked B.toask C.asking D.havingasked7.Onecanalwaysmanagetodomorethings,nomatter_______fullone’sscheduleisinlife.A.howB.whatC.whenD.where8.MarkneedstolearnChinese_______hiscompanyisopeningabranchinBeijing.

A.unless B.until C.although D.since9._______Ihavetogiveaspeech,IgetextremelynervousbeforeIstart.

A.Whatever B.Whenever C.Whoever D.However10.IhaveheardalotofgoodthingsaboutyouIcamebackfromabroad.A.sinceB.untilC.beforeD.when11.Hewassobusy.Hecannotaffordenoughtimewithhisson_____hewantsto.A.evenifB.asifC.becauseD.before12.small,thecompanyhasabout1,000buyersinover30countries.A.AsB.IfC.AlthoughD.Once13.Therearesomehealthproblemsthat,when______intime,canbecomebiggeroneslateron.A.nottreatedB.notbeingtreatedC.nottobetreatedD.nothavebeentreated14.wehaveenoughevidence,wecan'twinthecase.A.OnceBAslongasC.U