外研版英语必修二 Module 5 时间原因状语从句讲解

时间状语从句

由连词when,while,as,assoonas,before,after,till/until等引导。主句用将来时，从句常用一般现在时表将来。（主将从现）

Iwilltellhimwhenhecomesback.1.连接词when,while,as的用法区别when,while,as这三个连词都可表示“当……的时候”，使用时应注意：1)when可表示一个时间点，也可表示一个时间段。Whenhecamein,wewerehavingsupper.Whenwewerehavingsupper,thelightsuddenlywentout.2)while则只表示一个时间段。它所引导的时间状语从句中的时态常用进行时态。When/Whilehewaseatinghisbreakfast,heheardthedoorbellring.3)as着重指从句的动作与主句的动作相伴随发生。“随着……”，“一边……一边……”。Shesangasshewalkedalongthestreet.Astheelectionapproached,theviolence（暴行）gotworse.

连接词when的用法小结when引导时间状语从句，意为“当……的时候”2.when用作并列连词，常用于下列结构中，表示某件事正在发生,正要发生或刚刚发生，另一动作同时或紧接着发生。意为“就在那时/这时”,相当于andthen,andatthis/thattime。

was/weredoing…when…was/wereabouttodo…when…was/wereonthepointofdoing…when…haddone…when…Iwasonthepointofreadingbookswhensomeoneknockedatthedoor.

Wewereabouttostartwhenitbegantorain.Iwasplayingcomputergameswhenmomcamein.Ihadjustgothomewhenitbegantorainheavily/hard.3.Itis/was+时间点+when…当…时已是…时候了Itwasalready12o’clock______Igothome.Itwasalreadyat12o’clock______Igothome.4.when表示“既然;考虑到”

HowcanIhelpthemtounderstandwhentheywon’tlistentome?5.when表示“虽然;然而;可是”Sheclaimedtobe18,whenIknewshewasonly16.whenthat1.(04北京春)Wewereswimminginthelake______suddenlythestormstarted.A.when B.while C.until D.before2.(02上海)Hewasabouttotellmethesecret______someonepattedhimontheshoulder.A.as B.until C.while D.when3.(05上海)Hetransplantedthelittletreetothegarden______itwasthebesttimeforit.A.where B.whenC.that D.until4.(05福建)－DidJackcomebackearlylastnight?

－Yes.Itwasnotyeteighto’clock____hearrivedhome.A.BeforeB.whenC.that D.until5.(06辽宁)Hewasabouthalfwaythroughhismeal______afamiliarvoicecametohisears.A.why B.where C.whenD.whileADBBC连接词while的用法小结

1.while引导时间状语从句，意为“当……的时候”，引导的动作必须是持续性的。Pleasedon’ttalksoloudwhileothersareworking.Strikewhiletheironishot.

趁热打铁2.while作为并列连词，表对比，意为“然而，而，却”。

JanewasdressedinbrownwhileMarywasdressed

inblue.3.while引导让步状语从句，意为“尽管，虽然”，相当于although。WhileIadmitthattheproblemsaredifficult,Idon’tagreethattheycan’tbesolved.6.(06天津)ThecostoflivinginGlasgowisamongthelowestinBritain,______thequalityoflifeisprobablyoneofthehighest.A.since B.whenC.as D.while7.(04年江苏)______Iacceptthatheisnotperfect,Idoactuallyliketheperson.A.While B.SinceC.BeforeD.Unless8.________itistruethatastudent’smostimportantgoalistodowellinhisorherstudies,itdoesn’tneedtobetheonlygoal.AwhenBAsCWhileDBefore9.Marymadecoffee

herguestswerefinishingtheirmeal.(全国)A.sothatB.althoughC.whileD.asifDACC连接词as的用法小结1.引导时间状语从句，“当…时候,一边…一边…,随着…”。Shesangasshewalkedhomealltheway.Asshegrewolder,shebecamemorebeautiful.2.引导方式状语从句，“按照……(的方式)”。WheninRome,doasRomansdo.3.引导非限制定语从句，“正如,正像,如同”。Asweallknow,successcomesfromhardwork.4.引导原因状语从句，“由于,因为,既然”。Assheisfreetoday,shewouldliketodosomeshopping.5.让步状语从句“虽然”，“尽管”1）as引导的让步状语从句要倒装，句型为：形容词/副词/名词（不带冠词）/动词（原形）+as+主语+其它Youngasheis,heknowsalot.MuchasIlikeit,Ican’taffordit.Farmerasheis,heiswell-educated.TryasImight,Icouldn’tliftthestone.

2）although不倒装，though可倒装也可以不倒装,as必须倒装。Although/Thoughheisachild,heknowsalot.Childas/thoughheis,heknowsalot.2.till,until用法小结1).until/till从句用于肯定句时，主句的动词是延续性动作，意为“某动作一直延续到某时间点才停止”。

Wewaiteduntil/tillhecame.2).not…until“直到…才”，主句谓语动词是非延续性动词。强调主句的动作在某个具体时间或某件事发生之后才发生。

Hewon’tgotobeduntilhisfatherreturns.3).not…until句型中的强调和倒装（部分倒装）的用法：①Thesportsmeetingwillnotbehelduntilnextweek.Notuntilnextweek

willthesportsmeetingbeheld.Itis

notuntilnextweek

thatthesportsmeetingwillbeheld.②Hedidnotbegintoknowhowimportantthefamilywasforhimuntilhelefthishome.Notuntilhelefthishome

didhebegintoknowhowimportantthefamilywasforhim.Itwas

notuntilhelefthishome

thathebegantoknowhowimportantthefamilywasforhim.

1.(03北京春)－Washisfatherverystrictwithhimwhenhewasatschool?

－Yes.Hehadneverpraisedhim______hebecameoneofthetopstudentsinhisgrade.A.after B.unlessC.until D.when2.(03上海)Agoodstorytellermustbeabletoholdlisteners’curiosity______hereachestheendofthestory.A.whenB.unlessC.afterD.until3.Itwasnot______shetookoffherdarkglasses______Irealizedshewasafamousfilmstar.A.when;that B.until;that C.until;when D.when;thenCDB3.since的用法小结1)since表示“自…以来”；“从…以后”Ihaven’tseenhersincesheleft.2)常用句式★Itis/hasbeen+一段时间+since…(did）Itwas+一段时间+since…（haddone）

自从（不）…以来已有多长时间（若动词是非延续，直译；反之，反译）

Ithasbeenseveralmonthssincewegraduatedfromthemiddleschool.非延续性动词自从我们从这所中学毕业已经有几个月了。

Itis/hasbeentenyearssincehesmoked.延续性动词他戒烟已经十年了。3)since表示“既然”,“由于”Sinceyouarenotinterested,Iwon’ttellyouaboutit.4.before的用法小结1)before表示“在…以前”“还没来得及…就…”,“趁着还未…”，“…才”，“…就”Pleasewriteitdownbeforeyouforgetit.Wehadsailedfourdaysandfournightsbeforewesawland.HeleftbeforeIsaid“thankyou”tohim.2)before常用句式Itis/willbe+一段时间+before…（一般现在时）Itwas/wouldbe+一段时间+before…（一般过去时）要过多久才…Itwillnotbelongbefore…“要不了多久就……”Itwasnotlongbefore…“没过多久就……了”ItwillbehalfayearbeforeIcomeback.Itwon’tbelongbeforewemeetagain.Itwasthreeweeksbefore

hecameback.Itwasn’tlongbeforeheleftthecountry.1.(03年北京)Hemadeamistake,butthenhecorrectedthesituation______itgotworse.A.until B.when C.before D.as2.(04福建)Scientistssayitmaybefiveorsixyears______itispossibletotestthismedicineonhumanpatients.A.since B.after C.beforeD.when3.(06四川)－Whydidn’tyoutellhimaboutthemeeting?

－Herushedoutoftheroom____Icouldsayaword.A.beforeB.until C.when D.after4.(05北京春)Itisalmostfiveyears______wesaweachotherlasttime.A.beforeB.since C.after D.because

CCAB5.引导时间状语从句的名词短语themoment,theminute,theinstant,thefirst/secondtime,everytime,eachtime,nexttime,anytime,theday,theyearThefirsttimeIdrovethecar,Ifeltverynervous.Nexttimeyoucome,pleasebringyourcomposition.EverytimeIcaughtacold,Ihadpaininmyhead.Thedayhissonwasborn,hewenttothefront.6.bythetime的用法Bythetimeyoureadtheletter,I’llhavebeeninChina.BythetimeIarrivedattherailwaystation,thetrainhadleft.BythetimeJackreturnedhomefromEngland,hisson______________________college.(毕业）Bythetimeyougraduatefromtheschool,you________________Englishforsixyears.（学习）hadgraduatedfromwillhavelearned7.表示“一…就”的句型1）assoonas,themoment,theminute,theinstant,immediately,directly,instantly,hardly…when,scarcely…when,nosooner…thanAssoonashecomes,I’lltellhim.Themoment/minute/instantIsawhim,Irecognizedhim.Ileftdirectly/instantly/immediatelytheclockstruck5.Ihadnosoonerreachedhomethanitbegantorain.Hehadhardly/scarcelygotoutofhiscarwhenitcaughtfire.注意：如果hardly/scarcely/nosooner置于句首，主句用部分倒装。(p3复习部分倒装)Hardly/scarcelyhadIgothomewhenitbegantorain.Nosooner

hadIbeguntotalkthanherangoff.Nosooner

hadItoldhimmynamethanhestoppedlistening.HardlyhadIenteredtheroomwhenthetelephonerang.注意主从句的时态2)on/upondoingon/uponone’s+nOnarrivingatthestation,thethiefwasarrested.OnhisarrivalinParis,hewasrecognizedasafamousperson.1.(01北京春)－DidyouremembertogiveMarythemoneyyouowedher?

－Yes.Igaveittoher______Isawher.A.while B.themoment C.suddenly D.although2.(1998上海)Ithoughtherniceandhonest______Imether.A.firsttime B.forthefirsttime

C.thefirsttime D.bythefirsttime3.______enteredtheofficewhenherealizedthathehadforgottenhisreport.A.Hehardlyhad B.Hadhehardly C.Hardlyhadhe D.Hardlyhehad

BC