As用法小结asconj.adv.pron.prep.固定用法引导定语从句引导时间状语从句引导原因状语从句引导让步状语从句引导方式状语从句引导比较状语从句As作副词•“相同地”,“同样地”。Theydon’thaveasmanyairplanes.•他们没有同样多的飞机。•Asbeforeheremainedunmoved.•他和以往一样无动于衷.•Heisastallasmysister.时间状语从句AS作为连词原因状语从句比较状语从句让步状语从句方式状语从句.1.Strongasheis,heisafraidofpain.2.Slowlyasthetortoisewalks,itcanbeattherabbit.3.Doctorassheis,shecan’tcureherowndisease.4.Try(hard)ashedoes(will),heneverseemsabletodotheworkbeautifully.adj./adv+as+S+be/v.n.+as+S+be(句首名词不带冠词)v.+as+S+do/does/did句首是实义动词,其他助动词放在主语后。如实义动词有宾语和状语,随实一起放在主语之前。引导让步状语从句(倒装)•____dullhemaybe,heiscertainlyaverysuccessfultopexecutive.•A.AlthoughB.Whatever•C.AsD.HoweverD•MuchasIwouldhavelikedto,Icouldn’tlendhimthemoneybecauseIsimplydidn’thavethatmuchsparecash.(1999.62)•Fool___Janeis,shecouldnothavedonesuchathing.A.whoB.asC.thatD.like。.1、IreadtheletterasIwalkedalongtheriver.2.Asthewealthofthecountryincreases,morewastewillbeproduced.3.AsIwasgoingoutthetelephonerang.4.MotherwasworriedbecauselittleAlicewasill,especiallyasfatherwasaway.(一边…一边…)(随着…)(正要干…突然:同时发生)(当…时候)引导时间状语从句•Ithoughtofitjustasyouopenedyourmouth.•恰好在你开口时,我想到了它。•Justastheflyingwormhitherface,shegavealoudcry.•恰巧在飞虫撞到她脸上时,她大哭起来。..when/while/as1.Shecanwriteonlywhenthebabyisasleep.2.MypendroppedonthegroundwhenIwaswalkinginthepark.3.Iwasdrawingwhenhecamein.4.Wemuststrikewhiletheironishot.5.Whileweweretalking,theteachercamein.6.AsIlooked,someonecamenear.7.AsIgetolderIgetmoreoptimistic.区别连词时间与主句谓语动作只用aswhen点、段先于、同时发生while段、过程过程中、同时发生as当…的时候同时进行①同一个人的两种动作交替进行,“一边…,一边…”。②两个同步发展的动作或为,“随着”③表示两个短促行为或事件几乎同时发生。引导时间状语从句.1.Astheweatherwasfine,wedecidedtowalkedtotherestaurant.2.Sheliedtousbecauseshehadtodoinordertogetajob.辨析:一般来说,as表示听者已知的原因,因而常位于句首,而because表示听者未知的原因,因而常位于句尾,成为信息的焦点。因此,as不能回答why的问题,也不能在强调句型中作为被强调的成分。引导原因状语从句.1.WhenatRome,doasRomansdo.2.Ican’tchangeitlikeIusedto.3.PleasetrytowriteasIdo/likeme.辨析:做“如”“像”“按照”解的as可用作连词,其后可引出方式状语,在正式英语里like只能做介词不能做连词。当as和like都做介词时,词义不同,as表示“作为”以…资格“”,like则表示“像”“与…相似”引导方式状语从句as引导方式状语从句•as,(just)as…so…“如……,正如……一样”。justas比as语气要强一些。Leavethingsastheyare.让一切顺其自然Aswateristofish,soairistoman.我们离不开空气,犹如鱼儿离不开水。正如水对鱼一样重要,空气对于人同样重要。Wateristofishwhatairistoman.引导比较状语从句用于“as...as...或notso/as...as...”中,前一个as是副词,后一个as是连词,“如(不如)…一样”。•Iamastallasmymother(istall).•Idon'tspeakEnglishso/aswellashedoes.•注意:句中连词as后面的代词实际是省略了与主句相同的部分,•Atyourageyoucan’texpecttoplayfootballaswellasme(=asIdo)..as…as…表示倍数的句型1.TomisastallasI.2.Jackisnotas/socleverashissister.3.Thispencilishalf(aquarter)aslongasthatone.4.Soundtravelsnearlyfivetimesasfastinwaterasinair.Aisntimesasmuch(large,great,fast,many)asBA是B的几倍asmuchAasB•Teachingisasmuchanartasascience.•Hecanearnasmuchas5000dollarsamonth.多达notsomuchAasB•Successliesnotsomuchasinluckasinhardwork.√As作介词,•1.表示“好像(某人)”•2.表示“作为,当作”,•3.表示“当某人是(某身份)时。•4.表示“因某人是(某身份)”,•Theyenteredthebuildingdisguisedascleaners.•他们化装成清洁工人的模样进入大楼。•Ifoundajobasateacher.•我找了一份教师的工作•Asachild,shewassenttothreedifferentcountries.•她儿时去过三个不同的国家。•Asherprivatesecretaryhehasaccesstoallhercorrespondence.•他是她的私人秘书,能接触到她所有的信件。表示“因某人是(某身份)”表示“当某人是(某身份)时。表示“作为,当作”,表示“好像(某人)”试比较•Hespokeasateacher.•Hespokelikeateacher.•as“以实际的身份或地位”。•他作为老师发言./他以老师的身份发言.•like“与…相似,以与…相类似的方式”。•他讲话很像是老师”。AS作为关系代词•A.as引导定语从句用于以下结构•a)thesame...asThisisthesamebookasIreadlastweek.•b)such...asIdon'tlikesuchbooksasherecommends.•c)so+adj.+a/an+n.(单数)+asIamnotsostrongamanasIwas.B.as单独引导定语从句•as单独引导定语从句时,先行词可以是一个词,也可以是一个句子或短语。•Sheislate,asisoftenthecase.•她迟到了,这是经常的事。(先行词是整个主句)•Toshutyoureyestofacts,asmanyofyoudo,isfoolish.•对事实视而不见--你们好多人都是如此的愚蠢。(先行词是不定式短语)•Heseemstobeaforeigner,asinfactheis.(先行词是名词)..1.Asyouknow,I’vedecidedtoleaveattheendofthemonth.2.Thisisalsopartofyourwork,asItoldyoubefore.3.Taiwanis,asyouknow,aninseparablepartofChina.aseverybodyknows,asyoumayremember,asyousay,asIcansee,asIhavesaid,asyoumayhaveheard一些固定词组..asitis/…asitis1、Asitis,thingsaregettingbetterandbetter.2.Leaveitasitis.3.Ilikethehousebetterasitis.4.Statethefactsastheyare.用在句首的asitis(was)前面一般要有一个与事实相反的情节,而用asitis(was)来陈述真实的情况,通常译为“事实上”“实际上”“实际情况是”。句末则表示“按原来的样子”“照现在的样子”,常放在名词或代词的后面,it替代前面的单数名词,是复数则有用astheyare。(事实上)(别动它,保持原来的样子)(现在的样子)(实事求是地把事实摆出来。)as固定词组•1.as/sofaras•2.aslongas/aslongas•3.asmuch/manyas+数量词•4.asmuchas/ashighas(反义词aslittleas)•5.astallas•6.aswell/aswellas•7.asfor/asto•8.asif/asthough•9.asyet在…范围内,到…程度;一直到…;像…那么远只要;与…一样远也,又;与…一样好言其多与…一样高至少;关于好像,似乎到目前为止•asregards•asarule•asawhole•asfarasIknow/cansee至于某事物;提到某事物通常;一般说来总体上就我所知/依我看•thinkof…as…•treat…as…•lookon/upon….as…•consider…as…•bewell-knownas•referto…as•workas•actasAs的用法练习•Translatethefollowingsentences:•1.Tomrunsfast,butIrunjustasfast.•2.Shedoesn’tsingsowellashersister.•3.Ihavechangeditasyousuggested.•4.Wealllikeherassheisverykind.•5.Heraisedhisvoicesoastobeheard.•6.Tiredastheywere,theywalkedon.•7.Ineverheardsuchstoriesashetold.•8.Heiscareful,ashisworkshows.•9.Heworksasateacher.•10.Asyousow,sowillyoureap.•TomisastallasJim.•Myhandwritingisnotas/sogoodasyours.•Tomakemuchprogresslikehimwemuststudyashard.•Ashewastired,hewenttobedearly.•Thestudentsdidastheirteachertoldthem.•Shestoodatthedoorasifshewer