as用法系列(一)as在比较状语从句中应用.doc

as用法系列（一）as在比较状语从句中应用as简单之至的一个单词,用法却特别复杂.我会陆续分类收集整理,假如能对大伙有所裨益,我将颇感欣慰.as用法一.两种事物的同种属性进行比较,as中间是形容词或副词,结构如下:事物A+谓语+as/so+adj形容词/adv副词+as+事物B注:确信句用as,否定句用as/so均可.它们是adv副词用来修饰其后的adj形容词/adv副词,as是连词用来连接事物B.例句分析:1.Sheisasbeautifulashersister.她和她姐姐一样漂亮.造句步骤1.先写句子她漂亮Sheisbeautiful.确信句在形容词前加as,因此句子为:Sheisasbeautiful.步骤2.找比较对象她姐姐hersister,并在其前加as,因此为:ashersister步骤3.将1和2连起来完整句子为Sheisasbeautifulashersister.2.Shedoesntstudyas/sohardashersister.她不如她姐姐学习用功.造句步骤1.先写句子她学习不用功Shedoesntstudyhard.否定句在副词前加as/so,因此句子为:Shedoesntstudyas/sohard.步骤2.找比较对象她姐姐hersister,并在其前加as,因此为:ashersister步骤3.将1和2连起来完整句子为Shedoesntstudyas/sohardashersister.as用法二.事物A+谓语+倍数+as/so+adj形容词/adv副词+as+事物B倍数词:once,twice,threetimes,fourtimes.half,基数词+序数词基数词大于1,序数词后加+s来表示几分之几,三分之一onethird,三分之二twothirds,例句Mybooksaretwiceasmanyasyours.我的书是你的两倍多.as用法三.两种事物的同种属性进行比较,as中间是名词,结构如下:事物A+谓语+as+adj形容词+a+n名词as+事物B例句分析:Sheisascleverachildasmysister.她和我妹妹一样是聪明的孩子.造句步骤1.先写句子她是个聪明的孩子.Sheisacleverchild.as只修饰形容词,不能修饰a,因此a,clever交换位置,as放在clever前,因此句子为:Sheisascleverachild步骤2.找比较对象我妹妹mysister,并在其前加as,因此为:asmysister步骤3.将1和2连起来完整句子为:Sheisascleverachildasmysister.as用法四.主语+谓语+as+adj/adv+asonecancould/possible.尽可能.例:IreadthebookascarefullyasIcan.我尽可能认真地看这本书.注:以上几种用法均是形容词,副词原级比较从句,事物B都省略了与事物A后相同谓语部分,onecan后也省略了与谓语相同部分.as用法五.同种事物的两种不同属性,那么无比较含义,只说明这种事物具有两种属性,确信句意为又.又.,不但.而且.,.而,却.句子结构为:句子A+谓语+as+adj形容词+as+句子B例句分析:1.Sheisascleverassheisbeautiful.她既聪明又漂亮.造句步骤1.先写句子她聪明Sheisclever.确信句在形容词前加as,因此句子为:Sheisasclever步骤2.再写句子她漂亮Sheisbeautiful.在句子前加as,因此句子为:assheisbeautiful步骤3.将1和2连起来完整句子为:Sheisascleverassheisbeautiful.2.Weareaspooraswearehappy.我们穷但我们欢乐.3.Sheisasbeautifulashersisterisugly.她长得漂亮,她妹妹长得丑.造句步骤同1.不再赘述.as用法六:主语+be+as+adj+as+同一adjcanbe.例:asrichasrichcanbe富得不能再富了aspooraspoorcanbe穷得不能再穷了asdirtyasdirtycanbe脏得不能再脏了asbadasbadcanbe坏得不能再坏了asmuchasmuchcanbe多得不能再多了as用法七:as+adj+as+数字+名词例:asmanyasfivehundredstudents多达五百学生aslongasfivemeters长达五米aswideastwometers宽达两米astallastwometers高达两米asfarasthestation远至车站aslateastwointhemorning迟至凌晨两点asearlyaslastweek早在上周aseasyasABC极其容易,asbusyasbee特别忙as用法八:aswellas也,和能够看作连词,能够连接主语,谓语等并列成分.例:1.连接主语Theteacheraswellasherstudentsgoestotheparkeveryweek.谓语动词人称和数与原句主语保持一致.2.连接谓语ShedidherhomeworkaswellashelpedherbrotherwithhisEnglish.3.连接不定式Mymotherasksmetodomyhomeworkaswellascleanmyroom.连接不定式时,前一个带to,后一个多不带toaswell=too也,通常用在句末.Iamgoingtotheparkandmysisterisgoigtoaswell.mightjustaswelldosth最好干某事Wemightaswellstayathome.as用法九:notsomuch.as.与其说.不如说.可连接主语后任意并列成分.例:1.Heisnotsomuchmyteacherasmyfriend.与其说他是我老师,不如说他是我朋友.2.Successliesnotsomuchinluckasinhardwork.成功与其说在于运气,不如说在于努力工作.3.Wedonotsomuchhelpherasteachher.与其说我们在帮她,不如说我们在教她.4.Thelifeisnotsomuchtoteachushowtosolvetheproblemsastoteachushowtofacethedifficulties.生活与其说教我们怎么样解决问题,不如说教我们怎么样正视困境.注:notsomuch.连起来看作连词,not不与助动词连用.notsomuchas.=noteven甚至都不,其中not须与助动词连用.Hecantsomuchaswritehisownname.他甚至连名字都可不能写.as用法系列二as在定语从句中应用一.as在定语从句中做关系代词,在从句中充当主语,宾语,或表语,as做表语适应省略be动词.as在限制性定语从句中1.such+名词+as从句such用来修饰名词Idontlikesuchamanastalksbig.我不喜爱吹牛的人.Suchhouseasshecouldfindwasexpensive.凡是他能找到的房子都很贵.注意区别下面两句话Thisissuchaninterestingbookaseveryonelikes.定语从句as做宾语这是一本每个人都喜爱的书.Thisissuchaninterestingbookthateveryonelikesit.结果状语从句这是一本有趣的书以至于每个人都喜爱.such修饰名词,so修饰形容词或副词such+名词+as表列举Ilikesuchanimalsasdogs,cats.such+n+astodosthIamnotsuchafooltobelieveher.suchastodosthMetwithdisappointmentssuchastodrivememad.2.suchas从句such是代词在主句中充当主语,宾语,表语Suchasyouseeisourhouse.suchas表列举Iknowthreelanguages,suchasChinese,English.such+n+asto=such+n+that从句assuch意思是“本身”Moneyassuchwillseldombringhappiness.thesame+名词+as从句Ihavethesamebookasheisreading.定语从句as做宾语我有一本和他正在读的一样的一本书.两本书Ihavethesamebookthatheisreading.定语从句that做宾语我得到了他正在读的那本书.同一本书asso+adj+a+名词+as从句只能用名词单数HeisascleverachildasIeversaw.定语从句as做宾语他是我曾经见过的最聪明的孩子.so+形容词+astodosth=so.that.so修饰形容词或副词Igetupsoearlytocatchthefirstbus.soastodosth=inordertosthIworkedhardsoastofinishitbeforeweekend.as在非限制性定语从句中修饰主句,对主句所陈述的事实加以概括,补充,说明等,如今as和which一样.区别:1as位置灵活,可在主句前,可在主句后,which只能在主句后.2不是修饰主句,当前面有先行词时,不能用as,只能用which.例:Theelephantisnotlikeasnake,whichhasnolegs.更多例子:as做主语asiswellknowntousaswasmentionedbeforeascouldbeexpectedascouldbejudgedfromhereyesasmaybeseenfromthebookasisrecountedinhisstoriesaseveryonecoulddoasoftenhappensaswillbeshowninfig.3ashasbeenpointedoutashasbeenexplainedasisoftenthecaseasisusualHelistedthenamesasfollowsfollows永久是单数as做宾语asweallcanseeasweallknowasitisas用法系列三as在其它状语从句中应用as引导时间状语从句注意与when,while区别as常有随着的意思.1.Astimewentby,Ibecomemoreandmoreinterestedinmusic.AsIwasgettingoffthebus,Isawher.如今=whilewhen2.assoonasHegotajobassoonasheleftuniversity.as引导缘故状语从句注意与for,since,beacuse,nowthat区别AsIgotuplatethismorning,Iwaslateforschool.asthough引导让步状语从句as,though从句在主句之前,须倒装,从句中状语,动词原形,表语置于句首.如表语是名词,前置时省略冠词Childasheis,heknowsalot.Tryashemight,hecouldntfindajob.asifasthough引导方式状语从句从句一般用虚拟语气Theteachertreatsthestudentsasiftheywereherownchildren.justas引导方式状语从句WheninRome,doastheRomansdo.assolongas引导条件状语从句Aslongasyoustudyhard,youwontfailthetest.as用法系列四as的一些固定用法1.asa+职业作为.asateacherasastudent2.belookedonuponas看作.Heislookedonuponasmybestfriend.bedressedas装扮成.Heisdressedasaghost.beregardedas看作.Heisregardedasmybestfriend.3.asaresultof由于Asaresultoftheeconomy