高中英語語法專題系列：狀語從句課件狀語從句定義在復合句中擔任狀語成分的從句稱為狀語從句，修飾主句的謂語動詞，形容詞或副詞等。狀語從句定義在復合句中擔任狀語成分的從句稱為狀語從句，修飾主狀語從句分類1.時間狀語從句2.地點狀語從句3.原因狀語從句4.條件狀語從句5.讓步狀語從句6.目的狀語從句7.結果狀語從句8.方式狀語從句9.比較狀語從句狀語從句分類1.時間狀語從句1.時間狀語從句常用連詞：when,while,as,before,after,since,until(till),once,assoonas,themoment,immediately,each/everytime,thefirsttime,thelasttime,bythetime,whenever等引導。1.時間狀語從句常用連詞：1）whenwhen引導從句時，主從句的動作有先有后，也可以同時進行,從句的動作可以是持續性的，也可以是短暫的。WhenIgot

totheairport,theplanehadalreadytakenoff.（前后）WhenIlivedthere,IusedtogototheseasideonSundays.（持續）Whenthemovieended,thepeoplewentback.（短暫）1）whenwhen引導從句時，主從句的動作有先有后，也可以【注意】當when引導的時間狀語從句的主語與主句主語相同時，往往還可以用“when＋分詞”的形式替代該狀語從句。WhenIcameintotheroom,Ifoundhimlyingthereasleep.=Whencominginto

theroom,I

foundhimlyingthereasleep.=Cominginto

theroom,

Ifoundhimlyingthereasleep.【注意】當when引導的時間狀語從句的主語與主句主語相同時，2）whilewhile側重主句的動作發生在從句的時間之間，且從句的動詞必須是持續性的。Whilewewerechatting

,shewaslookingatthetimetableonthewall．WhileIslept,athiefbrokein.while+持續性動詞2）whilewhile側重主句的動作發生在從句的時間之間，3）asas表示

一邊…一邊…，強調從句和主句中兩個動作交替進行或同步進行。SometimesIwatchTVas

Iamhavingbreakfast．（一邊...一邊...）as表示隨著，此用法不用when或while替

Asspringwarmstheearth,allflowersbegintobloom.（隨著）3）asas表示一邊…一邊…，強調從句和主句中兩個動作交替4）beforebefore表示在一段時間之前。

HehadlearnedEnglishforthreeyearsbefore

hewenttoLondon.

Shedidn't

gooutbefore

shefinishedherhomework.(=not……until……)她把作業做完才出去的。4）beforebefore表示在一段時間之前。before從句往往帶有否定的含義，常譯為：還沒等到…就…；還沒來得及…就...。作此意時，從句中常見情態動詞can/could。ThemanhungupthephonebeforeIcouldanswerit.Healmostknockedmedownbeforehesawme.before從句往往帶有否定的含義，常譯為：還沒等到…就…before常用句型（必背句型）①Itwillbe+時間段+before+一般現在時：要等多久才…….

Itwillbefiveyearsbeforewemeetagain.②Itwon'tbelongbefore+一般現在時：等不了多久就會……

Itwillnotbelongbeforeyouregretwhatyouhavedone.③Itwas+時間段+before+一般過去時：等了多久就……Itwasminutesbeforethepolicearrived.

④Itwasn'tlongbefore+一般過去時：沒等多久就……ItwasnotlongbeforeIrealizedIwaswrong.

before常用句型（必背句型）【比較】Itis/hasbeen+時間段+since+一般過去時：自從……以來到現在已經有多長時間Itisthreeyearssincethewarbrokeout.【注意】Itisthreeyearssincehesmoked.他不吸煙已有3年了。Itisthreeyearssincehehassmoked.他吸煙已有3年了。【比較】Itis/hasbeen+時間段+since5）unitl/tilltill和until引導時間狀語從句時跟主句里肯定形式表示延續性動作的謂語動詞連用表示“到……為止”。Walkuntil/tillyoucometoawhitehouse.Iwill

staywithheruntil/tillhecomesback.5）unitl/tilltill和until引導時間狀語從till和until跟主句里否定形式表示非延續性動作的謂語動詞連用表示“直到……才(開始)”，這時until和till可用before代替。Not有時被no,nobody,nothing,never,hardly,little等否定詞所取代。People

donot

knowthevalueoftheirhealthtill/until/before

theyloseit.Don’tputoffwhatyoucandotodayuntiltomorrow.今日事，今日畢。=Never

putoffwhatyoucandotoday

untiltomorrow.till和until跟主句里否定形式表示非延續性動作的謂語【until常見考點】結構A：Notuntil+時間狀語(從句)+主句倒裝句Notuntil

shegothomedidsherealizethatshehadlosthernecklace.結構B：

Itis(was)notuntil+時間狀語(從句)+that+主句

強調句Itwasnotuntilyesterday

that

Irememberedit.Itwasnotuntil

IsawMargaretnextmorningthat

Ifelthappy.【until常見考點】結構A：Notuntil+時間狀語6）sincesince自……以來。主句中通常為延續性動詞的現在完成時，since從句中一般用短暫性動詞的一般過去時。Where

haveyoubeen

sinceIlastsawyou？Itisthreeyearssincehebegantosmoke.6）sincesince自……以來。主句中通常為延續性動詞的since還可以用作副詞或介詞。Youhavemade

greatachievementsinyourworksincegraduation.=Youhavemade

greatachievementsinyourworksinceyougraduated.since還可以用作副詞或介詞。7）assoonasassoonas...可譯為“一…就…”。Hewillcomeandsee

youassoonas

hegets

home.（主將從現）【注意】一…就…還可以用on/upondoing結構來表示。OnarrivinghomehecalledupLester.=Assoonashearrivedhome,hecalledupLester.7）assoonasassoonas...可譯為“【補充】immediately/instantly/directly和themoment,theminute,theinstant,thesecond這幾個名詞短語相當于assoonas，直接引導時間狀語從句，表示一…就…。Theyphonedherimmediatelytheyreachedhome.Telephonemethemoment(that)

yougettheresults.【補充】8）scarely/hardly…when…

nosooner…than…scarely/hardly…when…；nosooner…than…都表示剛……就……，主句通常用過去完成時,從句用一般過去時。He

hadnosooner

startedout

than

hefelt

homesick.Hehadhardly

startedhisspeechwhen

someonerose

torefutehispoints.8）scarely/hardly…when…

【注意】當hardly/scarcely,nosooner

位于句子的開頭時，主句須用倒裝語序。Hardlyhadshefallenasleepwhenaknockatthedoorwokeherup.

NosoonerhadIgot

homethanitbegantorain.【注意】9）onceonce作連詞時，一旦，但它含有的條件意味更濃。Onceyoubegin,youmustcontinue.

Onceyouseehim,youwillneverforgethim.

9）onceonce作連詞時，一旦，但它含有的條件意味更濃10）nexttime,thefirsttime等nexttime,

thefirsttime,thelasttime,

everytime,anytime,eachtime

直接引導時間狀語從句。Besuretocallonusnexttimeyoucometotown.IlovedthispicturethefirsttimeIsawit.【區別】I'vebeenhere

forthefirsttime.（副詞）10）nexttime,thefirsttime等n11）bythetimebythetime也可以引導時間狀語從句，意為到

….時為止，主句一般要用完成時態。Bythetime

hewasfourteen,Einsteinhadlearned

advancedmathematicsallbyhimself.

Iwillhavefinishedmyworkbythetimeyoureturn.11）bythetimebythetime也可以引經典例題1.IwassofamiliarwithhimthatIrecognizedhisvoice______Ipickedupthephone.A.whileB.afterC.IncaseD.theminute答案：D2.Howlongdoyouthinkitwilltake_______ourproductbecomespopularwiththeconsumers?A.whenB.untilC.beforeD.since答案：C經典例題1.Iwassofamiliarwith3.______thedaywenton,theweathergotworse.A.WithB.sinceC.AsD.While答案：C4.Hewashalfwaythroughhismeal____afamiliarvoicecametohisears.A.whyB.whereC.whenD.while答案：C5.Hardly______intothevillage______itbegantorain.A.wehadgot;whenB.wegot;thanC.hadwegot;whenD.didweget;than答案：C3.______thedaywenton,the2.地點狀語從句常用連詞：where,wherever,everywhere,anywhereWhere

Ilive,thereareplentyoftrees.我住的地方樹很多。Everywheretheywent,theywerekindlyreceived.無論他們去哪里，都受到熱情的款待。2.地點狀語從句常用連詞：【注意】在地點狀語從句之前，不要使用介詞。誤：Youshouldputthebookatwhereitwas.正：Youshouldputthebookwhereitwas.

誤：Weshouldgotowhereweareneededmost.正：Weshouldgowhereweareneededmost.【注意】【注意】區別where引導的定語從句和狀語從句。Putthebookwhereitwas.（狀語從句）=Putthebookattheplacewhereitwas.（定語從句）【注意】1.Whenhereadsabook,hishabitistomakeamark_______themeaningisuncleartohim.A.thereB.whereverC.theplaceD.inwhich答案：B2.Ifyouaretravelling______thecustomsaretotallydifferentfromyourown,youmayfeelaculturalshock.A.intheplaceB.whichC.inwhichD.where答案：D經典例題1.Whenhereadsabook,hish3.原因狀語從句常用連詞：as,because,since,now(that),consideringthat,seeingthat,giventhat3.原因狀語從句常用連詞：1）because①because等詞不能與so連用。Becauseitwasraining,Janeworearaincoat.②句型：Thereason(why)…isthat…

其中的that最好不用because代替。“之所以……是因為……”Thereason(why)I’mlateisthatImissedthebus.③because后接陳述句；becauseof后接短語等。Wesaidnothingaboutit,because

ofhiswife’sbeingthere.1）because①because等詞不能與so連用。【比較】

because和for的區別。1.for是并列連詞，只用于連接表示原因的分句，因此不能用于句首。because表示原因時，可位于句首。【誤】Forhedidnotobeytherules,hewaspunished.【正】Because

hedidnotobeytherules,hewaspunished.2.for表示的是推斷解釋，because強調動作發生的直接原因。Hedidn’tcometoschoolbecausehewasill.Hemightbeill,forhedidn’tcometoschool.【比較】

because和for的區別。2）since,as,nowthatSince

youhavenolicense,youarenotallowedtodrive.既然Astheweatherwasfine,wedecidedtoclimbthemountain.由于Now(that)youmentionitagain,Idoremember.

既然，因為2）since,as,nowthatSinceyou1.JennywasverysadoverthelossofthephotosshehadshotatCanada,______thiswasamemorysheespeciallytreasured.A.asB.ifC.whenD.where答案：A2.Somepeoplebelievethat______oilisrunningout,thefateofthemotorindustryisuncertain.A./B.thoughC.forD.since答案：D經典例題1.Jennywasverysadoverthe4.條件狀語從句常用連詞：if,unless(=ifnot),so（as）longas,onconditionthat,

providing，provided(that)，supposing，suppose(that)4.條件狀語從句常用連詞：1）if和unless(ifnot)Ifhedoesn'tcomeat8,wewon'twaitforhim.Heissuretocomeunlesshehassomeurgentbusiness.=Heissuretocome

if

hedoesnot

haveanyurgentbusiness.1）if和unless(ifnot)Ifhedoe2）as/solongas;onconditionthatsolongas,aslongas,onconditionthat這幾個短語意思差多，都表示只要，條件是……。As/Solongaswedon‘tloseheart,we’llfindawaytoovercomethedifficulty.Ishallgiveyoumydictionaryonconditionthat

youreturnittomorrow.2）as/solongas;oncondition1.Wewillbeabletogetthereontime,_____ourcardoesn’tbreakdownontheroad.A.assoonasB.asfarasC.aslongasD.aswellas答案：C2.Intimeofseriousaccidents,_____weknowsomebasicthingsaboutfirstaid,wecansavelives.A.whetherB.untilC.ifD.unless答案：C經典例題1.Wewillbeabletogetther3.______youhavetriedit,youcan’timaginehowpleasantitis.A.UnlessB.BecauseC.AlthoughD.When答案：A4.Theofficialsoonrealizedthat,______,thingswouldgetworse.A.unlessdealtwithproperlyB.ifnotproperlydealingwithitC.unlessproperlydealtwithD.ifdealtnotproperlywith答案：C3.______youhavetriedit,y5.讓步狀語從句常用連詞：although/though,as,evenif/eventhough,while,nomatter+疑問詞，whether（是否）5.讓步狀語從句常用連詞：1）although/thoughalthough常用語開頭Althoughhisillnesshadpreventedhimfromstudying,hemanagedtopastheexam.though可用于句首、句中或句末Ihaven‘tcheckedtheinformationyet,thoughIthinkitiscorrect.1）although/thoughalthough常用語開【注意】當有though,although時，后面的從句不能有but，但是能與yet可連用。Thoughshewasbusywithherwork,yet

shemanagedtofindtimetostaywithherfamily【注意】2）as/toughas/though引導讓步狀語從句表示“雖然、即使、盡管”，其引導的讓步狀語從句必須采用倒裝結構，放在句首。Greatas/thoughtheauthorwas,heprovedabadmodel.Childas/though

heis,hecantellblackfromwhite.(倒裝時要省去單個名詞前的冠詞)Tryhardas/though

hewill,heneverseemsabletodothework

satisfactorily.2）as/toughas/though引導讓步狀語從句表示“3）evenif/eventhoughevenif,eventhough解釋“即使”，兩者可以通用。Wewon'tbediscouragedeven

if/thoughwefailtentimes.Even

if/thoughyoufail,youwillhavegainedexperience.3）evenif/eventhoughevenif,4）whilewhile也可引導讓步狀語從句，突出主句和從句的對比，表示“盡管，雖然”。While

Iunderstandwhatyousay,Ican'tagreewithyou.Whileheloveshisstudents,

heisverystrictwiththem.4）whilewhile也可引導讓步狀語從句，突出主句和從句5）由nomatter+疑問詞和

由疑問詞＋ever引導讓步狀語從句由nomatter+疑問詞引導，表示“不管；無論”；由疑問詞＋ever引導，表示“不管，不論”。這類詞有：whatever，whichever，whoever，however，whenever，wherever等,他們相當于nomatter+what（which，who，how，when，where）。We‘llhavetofinishthejob,however(nomatterhow)longittakes.不管需要多長時間，我們都一定完成這項工作。Nomatterwhat(Whatever)

youdo,don‘ttellhimthatItoldyouthis.無論你做什么，別告訴他我對你說過這件事。5）由nomatter+疑問詞和

由疑問詞＋ever引導______Iacceptthatheisnotperfect,Idoactuallyliketheperson.A.WhileB.sinceC.BeforeD.Unless答案：A2.Theworkersaredeterminedtogothroughwiththeirrailwayproject,____theexpenseshaverisen.A.aslongasB.eventhoughC.nowthatD.asthough答案：B經典例題______Iacceptthatheisnot3.______,heknowsmorethanotherchildrenofhisage.A.HoweveryoungchildheisB.ChildasheisC.NomatterhowyoungchildisD.Whatayoungchildheis答案：B4.Ireallywantthematch,howevermuch______.A.doesitcostB.costsitC.willitcostD.itcosts答案：D3.______,heknowsmorethan6.目的狀語從句常用連詞：sothat,inorderthat,incase,lest,forfearthat6.目的狀語從句常用連詞：1）sothat和inorderthatsothat，inorderthat表示“為了，以便”。Theyhurriedsothat

theymight

notmissthetrain.【注意】sothat在目的狀語從句中要有情態動詞；無情態動詞則引導結果狀語從句。Inorderthateveryonepresentmighthearherclearly,sheraisedhervoiceagain.

1）sothat和inorderthatsothat【注意】當主從句的主語一致時，sothat和inorderthat引導的目的狀語從句可以轉換成相對應的動詞不定式結構。Theyhurriedsothat

theymightnotmissthetrain.=Theyhurriedsoasnottomissthetrain.【注意】2）incase,lest,forfearthatincase,lest,forfearthat幾個短語都表示“萬一，惟恐”，含有否定的意義,引導的目的狀語從句的中謂語要用一般現在時或者“should+動詞原形”（表示虛擬）。Bettertakemoreclothesincase

theweatheriscold.Theywatchedhimcloselyincaseheshouldescape.2）incase,lest,forfeartha1.Bringitnearer_____Imayseeitbetter.A.althoughB.eventhoughC.sothatD.since答案：C2.Hehadhiscameraready_____hesawsomethingthatwouldmakeagoodpicture.A.evenifB.ifonlyC.incaseD.so答案：C經典例題1.Bringitnearer_____Imay7.結果狀語從句常用連詞：so；so…that；such…that；sothatIdidn'tplantheworkwell,so/sothat

Ididn'tfinishitintime.Thebusbrokedownsothatwehadtowalkhome.7.結果狀語從句常用連詞：1）so...that1．so+形容詞副詞+that-從句Thewindwas

sostrongthatwecouldhardlymoveforward.2．so+形容詞+a/an+可數名詞單數+that-從句Hemadesoinspiringaspeechthateverybodygotexcited.

1）so...that1．so+形容詞副詞+tha3．so+many/few/+復數名詞+that-從句Ihavehadsomanyfalls

thatIamblackandblueallover.4．so+much/little+不可數名詞+that-從句IhadsolittlemoneythenthatIcouldn'tevenaffordausedcar.3．so+many/few/+復數名詞+that-從5.在so+形容詞/副詞+that-從句結構中，如將so+形容詞副詞位于句首，主謂語要倒裝。Soloudlydidhespeakthateventhepeopleinthenextroomcouldhearhim.Sobrightwasthemoonthattheflowerswerebrightasbyday.5.在so+形容詞/副詞+that-從句結構中，如將2）such...that1．such+a/an+形容詞+單數可數名詞+that-從句Jennyissuchaclevergirlthatallofuslikeherverymuch.2．such+形容詞+復數名詞+that-從句Theyaresuchinterestingnovelsthatallofuswanttoreadthem.3．such+形容詞+不可數名詞+that-從句Hemadesuchrapidprogressthattheteacherpraisedhim.2）such...that1．such+a/an+【注意】such+a/an+形容詞+單數名詞結構可以和so+形容詞+a/an+單數名詞結構互換。Hetoldussuchafunnystorythatwealllaughed.→Hetoldussofunnyastorythatwealllaughed.→Thestoryhetolduswassofunnythatwealllaughed.【注意】3）suchthatsuchthat可以連用，意思是（是）這樣...以致。Mother‘sanswerwassuchthat

shedidn’tsayyesandshedidn'tsayno.

Hisangerwassuchthat

helostcontrolofhimself.

3）suchthatsuchthat可以連用，意思是（是Wewerein________whenweleftthatweforgottheairlinetickets.A.arushsoanxiousB.asuchanxiousrushC.soananxiousrushD.suchananxiousrush答案：D經典例題Wewerein________whenwelef2.Theradiowasof______itookitbacktotheshop.A.tooinferiorqualitythatB.suchinferiorqualitythatC.quiteinferiorqualitythatD.soinferiorqualitythat答案：B2.Theradiowasof______it8.方式狀語從句常用連詞：as,(just)as…so…,

asif,asthough8.方式狀語從句常用連詞：1）as和(just)as...so...as,(just)as…so…可引導的方式狀語，意思是“正如…”，“就像”，多用于正式文體。Aswateristofish,soairistoman.我們離不開空氣，猶如魚兒離不開水。Justas

wesweepourrooms,soweshouldsweepbackwardIdeasfromourminds.正如打掃房屋一樣，我們也要掃除我們頭腦中落后的東西。1）as和(just)as...so...as,(jus2）asif/asthoughasif/asthough引出的狀語從句謂語多用虛擬語氣，表示與事實相反，有時也用陳述語氣，表示所說情況是事實或實現的可能性較大,

表示"仿佛…"，"好像…"。Theycompletelyignorethesefactsasif/asthough

theyneverexisted.他們完全忽略了這些事實，就仿佛它不存在似的。

Itlooks

asif/asthought

theweathermaypickupverysoon.看來天氣很快就會好起來。2）asif/asthoughasif/asth1.Emily

remembers

everything

exactly

it

happenedyesterday.A.asifB.evenifC.whenD.aslongas答案：A經典例題1.Emily

remembers

everything

9.比較狀語從句常用連詞：as，than，themore...themore...9.比較狀語從句常用連詞：1）asas...as,thesameas用于同等程度級的比較。否定句用notso/as…as,notthesame…asSheworksinthesamebuilding

as

mysister.1）asas...as,thesameas用于同等程度2）morethan表示不同程度級的比較Heistwoinchestallerthanhisfather.

=Heistallerthanhisfatherbytwoinches.2）morethan表示不同程度級的比較3）themore...,themore...themore...,themore...意思是越……就越……。Themore

youread,thebetteryouunderstand.（=Ifyoureadmore,youwillunderstandbetter.）3）themore...,themore...the倍數表達①倍數+

the

+名詞+of+比較對象。常用名詞：age,size,width,length,depth等。Ournewschoolisfourtimesthesizeoftheoldone.

②倍數+as……as+比較對象Hisfatheristwice/doubleasoldashe(is).Ournewschoolisfourtimesasbigastheoldone.

③倍數+形容詞/副詞比較級+than+比較對象Ournewschoolis

threetimesbiggerthantheoldone.倍數表達①倍數+the+名詞+of+比較對象。常用名詞1.ThenewstadiumbeingbuiltforthenextAsianGameswillbe______thepresentone.

A.asthreetimesbigasB.threetimesasbigasC.asbigasthreetimesD.asbigthreetimesas答案：B經典例題1.Thenewstadiumbeingbuil2.Americanseat________vegetablesperpersontodayastheydidin1910.

A.morethantwiceB.astwiceasmanyC.twiceasmanyasD.morethantwiceasmany答案：D2.Americanseat________vege__________volleyballishermainfocus,she'salsogreatatbasketball.A.SinceB.OnceC.UnlessD.While答案：D2.Ifalotofpeoplesayafilmisnotgood,Iwon'tbothertoseeit,orI'llwait____itcomesoutonDVD.A.whetherB.afterC.thoughD.until答案：D綜合練習__________volleyballisherm3.Asitreported,itis100years_____________QinghuaUniversitywasfounded.A.whenB.beforeC.afterD.since答案：D4.Nomatterhow________,itisnotnecessarilylifeless.A.adesertmaybedryB.dryadesertmaybeC.mayadesertbedryD.drymayadesertbe答案：B3.Asitreported,itis100y5.Hehadnosoonerfinishedhisspeech_____thestudentsstartedcheering.A.sinceB.asC.whenD.than答案：D6.Timisingoodshapephysically

hedoesn‘tgetmuchexercise.A.ifB.eventhoughC.unlessD.aslongas答案：B5.Hehadnosoonerfinishedh7.Theschoolrulesstatethatnochildshallbeallowedoutoftheschoolduringtheday,______accompaniedbyanadult.onceB.whenC.ifD.unless答案：D8.Peterwassoexcited_______hereceivedaninvitationfromhisfriendtovisitChongqing.A.whereB.thatC.whyD.when答案：D7.Theschoolrulesstatethat高中英語語法專題系列：狀語從句課件狀語從句定義在復合句中擔任狀語成分的從句稱為狀語從句，修飾主句的謂語動詞，形容詞或副詞等。狀語從句定義在復合句中擔任狀語成分的從句稱為狀語從句，修飾主狀語從句分類1.時間狀語從句2.地點狀語從句3.原因狀語從句4.條件狀語從句5.讓步狀語從句6.目的狀語從句7.結果狀語從句8.方式狀語從句9.比較狀語從句狀語從句分類1.時間狀語從句1.時間狀語從句常用連詞：when,while,as,before,after,since,until(till),once,assoonas,themoment,immediately,each/everytime,thefirsttime,thelasttime,bythetime,whenever等引導。1.時間狀語從句常用連詞：1）whenwhen引導從句時，主從句的動作有先有后，也可以同時進行,從句的動作可以是持續性的，也可以是短暫的。WhenIgot

totheairport,theplanehadalreadytakenoff.（前后）WhenIlivedthere,IusedtogototheseasideonSundays.（持續）Whenthemovieended,thepeoplewentback.（短暫）1）whenwhen引導從句時，主從句的動作有先有后，也可以【注意】當when引導的時間狀語從句的主語與主句主語相同時，往往還可以用“when＋分詞”的形式替代該狀語從句。WhenIcameintotheroom,Ifoundhimlyingthereasleep.=Whencominginto

theroom,I

foundhimlyingthereasleep.=Cominginto

theroom,

Ifoundhimlyingthereasleep.【注意】當when引導的時間狀語從句的主語與主句主語相同時，2）whilewhile側重主句的動作發生在從句的時間之間，且從句的動詞必須是持續性的。Whilewewerechatting

,shewaslookingatthetimetableonthewall．WhileIslept,athiefbrokein.while+持續性動詞2）whilewhile側重主句的動作發生在從句的時間之間，3）asas表示

一邊…一邊…，強調從句和主句中兩個動作交替進行或同步進行。SometimesIwatchTVas

Iamhavingbreakfast．（一邊...一邊...）as表示隨著，此用法不用when或while替

Asspringwarmstheearth,allflowersbegintobloom.（隨著）3）asas表示一邊…一邊…，強調從句和主句中兩個動作交替4）beforebefore表示在一段時間之前。

HehadlearnedEnglishforthreeyearsbefore

hewenttoLondon.

Shedidn't

gooutbefore

shefinishedherhomework.(=not……until……)她把作業做完才出去的。4）beforebefore表示在一段時間之前。before從句往往帶有否定的含義，常譯為：還沒等到…就…；還沒來得及…就...。作此意時，從句中常見情態動詞can/could。ThemanhungupthephonebeforeIcouldanswerit.Healmostknockedmedownbeforehesawme.before從句往往帶有否定的含義，常譯為：還沒等到…就…before常用句型（必背句型）①Itwillbe+時間段+before+一般現在時：要等多久才…….

Itwillbefiveyearsbeforewemeetagain.②Itwon'tbelongbefore+一般現在時：等不了多久就會……

Itwillnotbelongbeforeyouregretwhatyouhavedone.③Itwas+時間段+before+一般過去時：等了多久就……Itwasminutesbeforethepolicearrived.

④Itwasn'tlongbefore+一般過去時：沒等多久就……ItwasnotlongbeforeIrealizedIwaswrong.

before常用句型（必背句型）【比較】Itis/hasbeen+時間段+since+一般過去時：自從……以來到現在已經有多長時間Itisthreeyearssincethewarbrokeout.【注意】Itisthreeyearssincehesmoked.他不吸煙已有3年了。Itisthreeyearssincehehassmoked.他吸煙已有3年了。【比較】Itis/hasbeen+時間段+since5）unitl/tilltill和until引導時間狀語從句時跟主句里肯定形式表示延續性動作的謂語動詞連用表示“到……為止”。Walkuntil/tillyoucometoawhitehouse.Iwill

staywithheruntil/tillhecomesback.5）unitl/tilltill和until引導時間狀語從till和until跟主句里否定形式表示非延續性動作的謂語動詞連用表示“直到……才(開始)”，這時until和till可用before代替。Not有時被no,nobody,nothing,never,hardly,little等否定詞所取代。People

donot

knowthevalueoftheirhealthtill/until/before

theyloseit.Don’tputoffwhatyoucandotodayuntiltomorrow.今日事，今日畢。=Never

putoffwhatyoucandotoday

untiltomorrow.till和until跟主句里否定形式表示非延續性動作的謂語【until常見考點】結構A：Notuntil+時間狀語(從句)+主句倒裝句Notuntil

shegothomedidsherealizethatshehadlosthernecklace.結構B：

Itis(was)notuntil+時間狀語(從句)+that+主句

強調句Itwasnotuntilyesterday

that

Irememberedit.Itwasnotuntil

IsawMargaretnextmorningthat

Ifelthappy.【until常見考點】結構A：Notuntil+時間狀語6）sincesince自……以來。主句中通常為延續性動詞的現在完成時，since從句中一般用短暫性動詞的一般過去時。Where

haveyoubeen

sinceIlastsawyou？Itisthreeyearssincehebegantosmoke.6）sincesince自……以來。主句中通常為延續性動詞的since還可以用作副詞或介詞。Youhavemade

greatachievementsinyourworksincegraduation.=Youhavemade

greatachievementsinyourworksinceyougraduated.since還可以用作副詞或介詞。7）assoonasassoonas...可譯為“一…就…”。Hewillcomeandsee

youassoonas

hegets

home.（主將從現）【注意】一…就…還可以用on/upondoing結構來表示。OnarrivinghomehecalledupLester.=Assoonashearrivedhome,hecalledupLester.7）assoonasassoonas...可譯為“【補充】immediately/instantly/directly和themoment,theminute,theinstant,thesecond這幾個名詞短語相當于assoonas，直接引導時間狀語從句，表示一…就…。Theyphonedherimmediatelytheyreachedhome.Telephonemethemoment(that)

yougettheresults.【補充】8）scarely/hardly…when…

nosooner…than…scarely/hardly…when…；nosooner…than…都表示剛……就……，主句通常用過去完成時,從句用一般過去時。He

hadnosooner

startedout

than

hefelt

homesick.Hehadhardly

startedhisspeechwhen

someonerose

torefutehispoints.8）scarely/hardly…when…

【注意】當hardly/scarcely,nosooner

位于句子的開頭時，主句須用倒裝語序。Hardlyhadshefallenasleepwhenaknockatthedoorwokeherup.

NosoonerhadIgot

homethanitbegantorain.【注意】9）onceonce作連詞時，一旦，但它含有的條件意味更濃。Onceyoubegin,youmustcontinue.

Onceyouseehim,youwillneverforgethim.

9）onceonce作連詞時，一旦，但它含有的條件意味更濃10）nexttime,thefirsttime等nexttime,

thefirsttime,thelasttime,

everytime,anytime,eachtime

直接引導時間狀語從句。Besuretocallonusnexttimeyoucometotown.IlovedthispicturethefirsttimeIsawit.【區別】I'vebeenhere

forthefirsttime.（副詞）10）nexttime,thefirsttime等n11）bythetimebythetime也可以引導時間狀語從句，意為到

….時為止，主句一般要用完成時態。Bythetime

hewasfourteen,Einsteinhadlearned

advancedmathematicsallbyhimself.

Iwillhavefinishedmyworkbythetimeyoureturn.11）bythetimebythetime也可以引經典例題1.IwassofamiliarwithhimthatIrecognizedhisvoice______Ipickedupthephone.A.whileB.afterC.IncaseD.theminute答案：D2.Howlongdoyouthinkitwilltake_______ourproductbecomespopularwiththeconsumers?A.whenB.untilC.beforeD.since答案：C經典例題1.Iwassofamiliarwith3.______thedaywenton,theweathergotworse.A.WithB.sinceC.AsD.While答案：C4.Hewashalfwaythroughhismeal____afamiliarvoicecametohisears.A.whyB.whereC.whenD.while答案：C5.Hardly______intothevillage______itbegantorain.A.wehadgot;whenB.wegot;thanC.hadwegot;whenD.didweget;than答案：C3.______thedaywenton,the2.地點狀語從句常用連詞：where,wherever,everywhere,anywhereWhere

Ilive,thereareplentyoftrees.我住的地方樹很多。Everywheretheywent,theywerekindlyreceived.無論他們去哪里，都受到熱情的款待。2.地點狀語從句常用連詞：【注意】在地點狀語從句之前，不要使用介詞。誤：Youshouldputthebookatwhereitwas.正：Youshouldputthebookwhereitwas.

誤：Weshouldgotowhereweareneededmost.正：Weshouldgowhereweareneededmost.【注意】【注意】區別where引導的定語從句和狀語從句。Putthebookwhereitwas.（狀語從句）=Putthebookattheplacewhereitwas.（定語從句）【注意】1.Whenhereadsabook,hishabitistomakeamark_______themeaningisuncleartohim.A.thereB.whereverC.theplaceD.inwhich答案：B2.Ifyouaretravelling______thecustomsaretotallydifferentfromyourown,youmayfeelaculturalshock.A.intheplaceB.whichC.inwhichD.where答案：D經典例題1.Whenhereadsabook,hish3.原因狀語從句常用連詞：as,because,since,now(that),consideringthat,seeingthat,giventhat3.原因狀語從句常用連詞：1）because①because等詞不能與so連用。Becauseitwasraining,Janeworearaincoat.②句型：Thereason(why)…isthat…

其中的that最好不用because代替。“之所以……是因為……”Thereason(why)I’mlateisthatImissedthebus.③because后接陳述句；becauseof后