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条件状语从句方式状语从句比较状语从句JadyGuo条件状语从句：可位于句首也可位于句尾，有时还可以至于主语谓语之间。引导状语从句的连接词有:If,unless,as/solongas,incase,providedthat,onconditionthat,once,supposing在条件状语从句中，一般用一般现在时表示一般将来时，一般过去时表示过去将来时，现在完成时表示将来完成时。If---如果，表示在某种条件下可能发生的某事Ifyoudon’thurryup,youwillmisstheplane.Ifitsnowstomorrow,theflightwillbecanceled.Ifyouleaveat6o’clocktomorrowmorning,you’dbettergettobednow.如果你请他帮忙，他会帮助你的。如果你考试不及格，你会让他失望的。如果他也去派对，那我也去。Ifyouaskhim,hewillhelpyou.Ifyoufailintheexam,youwilllethimdown.Iwillgotothepartyifhegoestheretoo.Unless---如果不,除非=ifnotWecan’tgetthereontimeunlesswebooktheearliestflight=Wecannotgetthereontimeifwedon’tbooktheearliestflight.除非你早点动身，否则你就不能及时赶到那里。除非下雨，否则比赛将照常进行。Youwillfailtoarrivethereintimeunlessyoustartearlier.Unlessitrains,thegamewillbeplayed.Don’ttroubletroubleunlesstroubletroublesyou.Hewillnotjoinusunlesshechangeshismind.Aslongas---只要Wewillsucceedaslongaswekeepontrying.Youcan’tplaygamesaslongasyouremembertherules.Amanisnotoldaslongasheisseekingsomething.只要你开心，你做什么都没关系。只要我们不灰心，我们就一定会克服所有困难。Aslongasyouarehappy,itdoesn’tmatterwhatyoudo.Aslongaswedon’tlostheart,wewillovercomeanydifficulty.As(so)faras---据……所知AsfarasIknow,hespeaksEnglishverywell.As/SofarasIknow,heisanexpertonDNA.Incase---假使,如果万一常放在主句前Theplanecannottakeoffincaseitrains.Sendusamessageincaseyouhaveanydifficulty.如果他来了，让他等一下。万一发生什么重要的事情，请给我打电话。Incasehecomes，tellhimtowaitawhile.Incaseanythingimportanthappens,pleasecallmeup.Providedthat如果,有时省略thatTheplanewillbeingoodconditionprovidedthatitistakencareofcarefully.Youcanbecomeastewardessprovidedthatyouareingoodshapeandyouhavegotthepropereducation.Onconditionthat---条件是…引导的条件从句是主句事件发生的前提条件或者唯一条件，意为“在。。。条件下”Hesaidthathewouldcometothemeetingonconditionthatnooneaskedhimtospeak.ThemotherpromisedtothesontobuyhimatoyairplaneonconditionthathepasseshisEnglishtest.我可以告诉你真相，条件是你答应保守秘密。只要你肯帮助我，我就愿意做此事。Icantellyouthetruthonconditionthatyoupromisetokeepitasasecret.Iwilldoitonconditionthatyouhelpme.Once引导的条件状语从句一旦。。。就可置于主句前后Oncevirtueislost,allislost.Onceyoushowanyfear,thedogwillattackyou.一旦你露出怯意，这条狗就会袭击你。一旦道德丢失了，什么都失去了。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.Hesaidhewouldnotleaveunlessitwasfinenextday.2.比较状语从句：一般在句尾引导比较状语从句的连词有：As…as…,notso(as)…as…,.…than…,themore…themore...As…as…---像……一样同级比较Ifyoudon’twanttomisstheflight,youneedtobeattheairportasearlyaspossible.Mygrandmatoldmethathereyesightwasasgoodas10yearsbefore.Cultivationtothemindisasnecessaryasfoodforthebody.他英语说的和你一样好。他醒得和入睡一样突然。HespeaksEnglishaswellasyoudo.Hewokeupassuddenlyashehadfallenasleep.不同级比较：Notso(as)…as…---不像……ThejobisnotsodifficultasIthoughtitwouldbe.Theflightwasnotso/asharmfulasthecaptainpredicted.他的书法不如你的好。他英语说的不如你好。Hishandwritingisnotasgoodasyours.Hedoesn’tspeakEnglishaswellasyoudo.差级或最高级比较：…than…---比……怎么样，用于事物间的比较，more后面用形容词或副词Peoplebelievethatbeingastewardessisbetterthanmostoftheotherjobs.IpersonallythinkthattheAmericanmoviesaremoreinterestingthanChineseones他比我们想象得要成功得多他挣得钱和你挣的钱一样少Hewasmoresuccessfulthanwehadexpected.Hecanearnnomoremoneythanyoucan.比较关系的状语从句Themore…,themore---越……越Themorehelistenedtothatsong,thelessheenjoyedit.Themorethingsamanisashamedof,themorerespectableheis.你越小心出的错就越少。你会来得越早越好。Themorecarefulyouare,thefewermistakesyouwillmake.Thesooneryouareback,thebetteritwillbe.必背：常见的比较句型。•Hisfatheristwicedoubleasoldashe(is).•Hisfatheristwotimesolderthanhe.•他爸爸的年龄是他的两倍。Ournewschoolisthreetimesbiggerthantheoldone.•我们的新学校比老学校大三倍。•Ournewschoolisfourtimesasbigastheoldne.•我们的新学校是老学校的四倍大。•Ournewschoolisfourtimesthesizeoftheoldone.•我们的新学校是老学校的四倍。3.方式状语从句方式状语从句常见的引导词有表示“像……”的as和表示“好像……”的asif/asthough，\例如：Let’sstudyasLeiFengstudied.让我们像雷锋那样学习吧。//ThinkasIthink.像我这样去想。//Hetalksasif/thoughheisdrunk.从他谈话的样子来看他好像醉了。常用：as,asif,asthoughas---与……一样as,(just)as…so…引导的方式状语从句通常位于主句后，但在(just)as…so…结构中位于句首，这时as从句带有比喻的含义，意思是正如…，就像，多用于正式文体，例如：DoinRomeastheRomansdo.Leavethingsastheyare.•Alwaysdototheothersasyouwouldbedoneby.你希望人家怎样待你，你就要怎样待人。•Aswateristofish,soairistoman.我们离不开空气，犹如鱼儿离不开水。•Justaswesweepourrooms,soweshouldsweepbackwardideasfromourminds.正如打扫房屋一样，我们也要扫除我们头脑中落后的东西。As练习你要像我这样做实验。你现在这样子好极了。YoumustdotheexperimentasIdo.Youarefinejustasyouare.asif,asthough---仿佛,两者的意义和用法相同，引出的状语从句谓语多用虚拟语气，表示与事实相反，有时也用陈述语气，表示所说情况是事实或实现的可能性较大。汉译常作仿佛……似的，好像……似的，例如：•Theycompletelyignorethesefactsasif(asthough)theyneverexisted.他们完全忽略了这些事实，就仿佛它不存在似的。（与事实相反，谓语用虚拟语气。）•Helooksasif(asthough)hehadbeenhitbylighting.他那样子就像被雷击了似的。（与事实相反，谓语用虚拟语气。）•Itlooksasiftheweathermaypickupverysoon.看来天气很快就会好起来。（实现的可能性较大，谓语用陈述语气。）他们完全忽略了这些事实，就仿佛他们从未存在过。她闭上了眼睛好像累了。Theycompletelyignorethesefactsasif/asthoughtheyneverexisted.与事实相反。谓语用虚拟语气Sheclosedhereyesasifshewastired.事实，谓语用陈述语气