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语法讲解：状语从句1、定义：在复合句中由从句表示的状语称作状语从句，它可以用来修饰谓语（包括非谓语动词）、定语或状语，或是整个句子。、2、分类：时间地点原因目的结果条件方式比较让步3、时间状语从句：when,while,as,themoment,before,after,till,until,since,assoonas等①请注意when,while,as的区别*When---当……时候,主句与从句的动作同时发生，接时间点或时间段Eg：WhenIcamehome,Imetanoldschoolmateofmine.*While---在……期间，只能接时间段Eg：Whileweweretalking,hecamein.*As---一边……一边,随着，通常用进行时Eg：Shewasdoingherhomeworkasshewaslisteningtothemusic.②themoment：做连词用，一……就，=assoonas,immediatelyEg：IgaveherthemomentIsawher.③Not…until---直到……才可以和when互换Eg：Hedidn’tleavetheofficeuntilhefinishedthework.=Helefttheofficewhenhefinishedthework.④before：Itwas/willbe…before…是常用句型Eg：ItwasnotlongbeforeIforgotitall.⑤Since---自从……,通常主句用现在完成时Itis/hasbeen…since…是常用句型Eg：IhaveneverbeenthereagainsinceIgraduatedfromtheuniversity.⑥Nosoonerthan---一……就……用于句首要求倒装Eg：Nosoonerhadhearrivedthanhewentawayagain.类比：Hardly（Scarcely）…when…⑦Once---一但……就……Eg：Onceyouseehim,youwillneverforgethim.⑧Everytime,eachtime每次做连词用Eg：Eachtimehecametotown,hewouldvisitourschool.4、条件状语从句：If,unless,aslongas,incase,providedthat,onconditionthat①If---如果；②Unless---如果不,除非=ifnot；③Aslongas---只要；④As(so)faras---据……所知；[来源:Zxxk.Com]⑤Incase---假使,如果Eg：Theplanecannottakeoffincaseitrains.⑥Providedthat如果,有时省略thatEg：Theplanewillbeingoodconditionprovidedthatitistakencareofcarefully.⑦Onconditionthat---条件是…Eg：Hesaidthathewouldcometothemeetingonconditionthatnooneaskedhimtospeak.注:主从句的动作发生在将来时，则主句用将来时,从句用一般现在时。Ifhearrivestomorrow,Iwillbewaitingforhimattheairport.5、地点状语从句Where,wherever①Where---在……地方eg：Wherethereisawill,thereisaway.②Wherever---无论哪里eg：Whereveryouare,Iwillberighttherewaitingforyou.6、原因状语从句because,as,since,nowthat,和consideringthat,seeingthat（语气逐渐减弱） Because---因为,通常从句放在主句后.As---因为,通常放在句首Since---既然因语气较弱,常译为既然Nowthat---既然consideringthat---顾及到Consideringthattheyarejustbeginners,theyaredoingquiteagoodjob.seeingthat---由于Seeing(that)quiteafewpeoplewereabsent,wedecidedtoputthemeetingoff.7、结果状语从句that,sothat,so…that…such…that①So…that---太……以至于so后面应用形容词或副词,有时省略so只用that②Sothat---因而，以便，为了有时so可以省去③Such…that…---太……以至于用法与so…that相同，但such后面应用名词。8、目的状语从句that,sothat,inorderthat,forfearthat,lest①(So)that---以便,从句中常常使用一些情态动词，如：can,could,may,might,should等Eg：Let’stakethefrontseats(so)thatwemayseemoreclearly.②inorderthat---为了,与sothat相同③forfearthat---生怕;为了防止(某事发生)Eg：Hetookthenamedownforfearthatheshouldforgetit.④Lest---以防万一Eg：Themandecidedtotellhisbossthefactlesthewouldbeangrywithhim.9、比较状语从句As…as…,notso(as)…as…,.…than…,themore…themore...①As…as…---像……一样Eg：Cultivationtothemindisasnecessaryasfoodforthebody.②Notso(as)…as…---不像……Eg：ThejobisnotsodifficultasIthoughtitwouldbe.③Themore…,themore---越……越Eg：Themorehelistenedtothatsong,thelessheenjoyedit.10、让步状语从句Although,though,as,evenif,eventhough,nomatter,however,whatever,while,whether①Although,though---虽然although和though可以互换，但although只能放在句首。Though可以用于倒装。Eg：Althoughitwasraining,theplanemanagedtotakeoff.Childthoughhewas,hedidquitewell.（Though可用as替代）②As---尽管as引导让步状语从句时，句子通常倒装。可与though互换。Eg：Busyasheis,henevermissesafootballmatch.③Evenif/eventhough---即使Eg：Evenifyoudon’tlikeyourboss,youshoulddoyourwork.④However---不论，however引导让步状语从句时，句子通常倒装Eg：Thefathercouldn’tmakehisdaughtersmilehoweverhardhetried.⑤Nomatter(what,when,where,how)---无论（什么，何时，何地，怎样）Eg：Pleasetellmetheresultnomatterwhenyougetit.*联系名词性从句⑥While---尽管表示对照 Eg：WhileIhavesympathyforyou,Ican’thelpyou.⑦Whether---不管，常与ornot连用11、方式状语从句as,asif,asthough①as：与……一样Eg：DoinRomeastheRomansdo.②asif,asthough---仿佛,由asif或asthough引导的从句中可用虚拟语气Eg：Shestoodatthedoorasif(=asthough)shewerewaitingforsomeone.
