高三定语从句讲解解析

1.时间状语从句2.地点状语从句3.原因状语从句4.条件状语从句5.让步状语从句6.目的状语从句7.结果状语从句8.方式状语从句9.比较状语从句九种常用的状语从句及其常用的连接词when,while,as,before,after,till,until,not…until,thefirst/second…/lasttime,assoonas,themoment,theminute,theinstant,immediately,directly,instantly,hardly…when,scarcely…when,nosooner…than1.时间状语从句九种常用的状语从句及其常用的连接词2.地点状语从句where,wherever3.原因状语从句because,since,as,for,nowthat,seeing(that),considering(that)4.比较状语从句than,as…as,notso/as…as,the+比较级…,the+比较级…if,unless,as(so)longas,incase,onconditionthat,suppose(that),supposing(that),provided(that),providing(that)although,though,eventhough/if,as,while,nomatterwhich/what/when/where/who/how,whichever,wherever,whatever,whoever,whenever,however,whether…or；evenif/though5.条件状语从句6.让步状语从句7.结果状语从句so,sothat,so…that,such…that8.目的状语从句sothat,incase,forfearthat,inorderthat9.方式状语从句as,asif/asthough连接词when的用法小结1.when可用来引导时间状语从句，意为“当……的时候”从句的谓语动词可以是延续的，也可以是短暂的。Whenthefilmended,theywentback.WhenIlivedthere,IusedtogototheseashoreonSundays.2.When常用于下列句式：意为“就在那时突然…”。wasdoingsth…when…(正在做…这时突然…)wasabouttodo…whenwasonthepointofdoingsth...when…(正要做…这时突然…)haddone…when(刚做完…这时突然…)3.when可以表“既然”，如：HowcanIhelpthemtounderstandwhentheywon’tlistentome?一、时间状语从句1.Wewereswimminginthelake______suddenlythestormstarted.A.whenB.whileC.untilD.before2.Hewasabouttotellmethesecret_____someonepattedhimontheshoulder.A.asB.untilC.whileD.when3.Hewasabouthalfwaythroughhismeal______afamiliarvoicecametohisears.A.whyB.whereC.whenD.whileADCWhenitcomesto当谈到，当涉及到…1.while可用来引导时间状语，意为“当…的时候，在…期间”；引导的动作必须是持续性的，如：1.Pleasedon’ttalksoloudwhileothersareworking.2.while作为并列连词，意为“然而，却”，表示对比。2.JanewasdressedinbrownwhileMarywasdressedinblue.3.while也可用来引导让步状语，意为“尽管，虽然”；可表示尽管，相当于although3.WhileIadmitthattheproblemsaredifficult,Idon’tagreethattheycan’tbesolved.4趁着…的情况赶紧做,否则来不及了4.Strikewhiletheironishot.连接词while①.多用于动作发生时间较短时，常有“正当….之时”之意Shefelloffthebusasshegotdown.②.表“一边…一边…”或“随着….”Hewhistledasherodeon.__________________,(随着时间的流逝)hebecamelessactive.连接词asAstimewentby③as还可表“由于….”，引导原因状语从句I’mnotgoingoutasIhavealottodo.④as还可用于倒装句表“虽然”，引导让步状语从句。5）as还有按照，正如，和…一样，….等not….until…的倒装句和强调句。Hedidn’tstopuntilhehadfinishedallhiswork.倒装句:Notuntil强调句:强调句句式为：Itwas/isnotuntil…that…Itwasnotuntilhehadfinishedallhisworkthathestopped.hehadfinishedallhisworkdidhestop.since的用法：since表从过去某一时间或动作、事情起到目前为止，“自….以来”①、引导状语从句时，主句用现在完成时或现在完成进行时，从句中用一般过去时。I’vebeenlivingheresinceIcametoBeijing.IhavewrittenhomefourtimessinceIcamehere.②、常用句型：自从…已经多长时间了ItisfiveyearssinceIbegantolearnEnglish.itis(hasbeen)+一段时间+since+一般过去时注意：since句型中如果从句谓语是延续性的动作或状态，则它所表示的时间从该动作或状态结束时算起！即不做sth已经多长时间了如：1.Itis3yearssinceIbegantosmoke2.Itis3yearssinceIsmoked(自从我开始抽烟以来已经三年了).(自从我戒烟以来到现在已经三年了).连接词before的句型：．BeforeIcouldgetinaword,hewalkedaway.“还没来得及”1）Itwillbe＋段时间＋before+一般现在时“还要过多久才/就…”如：Itwillbetwoyearsbeforeheleavesthecountry.2）Itwas＋一段时间＋before+did“过了多久才/就……”如：Itwasn’ttwoyearsbeforeheleftthecountry.Bythetime的用法这个词组常用来指到某一时间点为止，主句常用完成时态。Bythetimehewas12,___________________tomorethan30countriestogethisdiseasescured.（travel）到12岁时，他已去过30多个国家治疗疾病。BythetimeIgraduatenextyear,I___________________herefor5years.到明年毕业时，我将在这里住了5年。hehadtraveledIwillhavelived1.thefirst/second…/lasttime,eachdaythedaytheyear…2.一…就…：(1)assoonas(2)themoment,theminute,thesecond，theinstant,(3)immediately,directly,instantly,(4)hardly/scarcely…when,nosooner…than名词短语作连词引导时间状语从句：AssoonasIreachhome,Iwilltellhimthenews.特别注意：Hardly\Scarcely，Nosooner位于句首时，主句要部分倒装Hardly\Scarcely+___________+when+_____Nosooner+_____________+than+______1.Hehadhardlygottothestationwhenthetrainleft.Hardly__________tothestationwhenthetrainleft.hadsbdonehadsbdonediddidhadhegotItisfiveyears____hegraduated.Itisfiveyearsago_____hegraduated.Itwasfiveyears______hegraduated.Itwillbefiveyears______hegraduates.Itwasfiveo’clock______helefthome.Itwasatfiveo’clock______helefthome.sincethatbeforebeforewhenthatbefore，when，that，since2.地点状语从句地点状语从句用连接副词where或wherever(在任何地方)引导。e.g.a.Juststaywhereyouare.b.Whereveryougo,I’llberightherewaitingforyou.1.Whenhereadsabook,hishabitistomakeamark_______themeaningisuncleartohim.A.thereB.whereverC.theplaceD.inwhich2.Ifyouaretravelling______thecustomsaretotallydifferentfromyourown,youmayfeelaculturalshock.A.intheplaceB.whichC.inwhichD.where三、原因状语从句1)because表示某件事情发生的直接原因或理由，因而常用来回答why的提问。在这几个连词中，它表示原因的语气最强。如：Hedidn’tcometoschoolyesterdaybecausehewasill.2)since常表示对方已经知道的既成事实，说话人根据这个事实得出某一种结论。其语气比because要弱，一般译成“既然”。（nowthat,seeingthat,considering(that)，when既然）Sinceyouarehere,whynotstayforafewmoredays?3)as常用于表示十分明显的原因，说明因果关系，重点放在主句上，语气较弱，常译成“由于”。如：Asit’sgettingdarker,wemustgohomenow.4)for只是一个并列连词，用于连接两个并列句，表示推理或解释，对前一个分句进行附加说明，位于句中，,之后。如：Itmusthaverainedlastnight,forthegroundiswetinthat，原因在于引导目的状语从句的连词:inorderthat…所引从句可于主句前或后。sothat较常用，一般用于主句后,有时可分开，so有时可省;从句中要有情态动词，否则,就成为结果状语从句：forfear（that）唯恐，incase以防，万一四、目的状语从句1.Ihurried_____Iwouldn’tbelateforclass.A.sinceB.sothatC.asifD.unless2.Youmustspeakloudersothat/inorderthatyoucanbeheardbyall.3.Hewrotethenamedownforfearthatheshouldforgetit.4.Bettertakemoreclothesincasetheweatheriscold.五、结果状语从句sothat，so