高三英语专题复习----as-用法归纳

高三英语专题复习-as用法归纳,as用法归纳,as一词在高中课本中，看起来简单，但用法很多，经常出现，而又不易掌握。主要表现在词性多，词义广，用法灵活。现将其用法归纳如下：,.as作副词，表示程度，意为“同样地”。在“asas”,“notasas”结构中的第一个as是副词，作“和/与(不)一样”解。e.g,Jackisastallashisfather.HedoesntspeakEnglishas/sofluentlyasyou.,.as作连词，主要引导以下状语从句：,1.引导时间状语从句。与while意义相近，强调两个动作同时发生；或某事一发生，另一事立刻发生。e.gHeshoutedaloudasheranalong.Iwasstartledasheopenedthedoor.Wegetwiseraswegetolder.,2.引导原因状语从句，与because的用法相近。,e.g,Asitwasgettingverylate,wesoonturnedback.Wemuststopwritingnow,asIhaveratheralotofworktodo.,3.引导方式状语从句，作“正如，好象，按照”解。主要的句式有asif(asthough);justas;justasas.e.g,WhenatRome,doasRomansdo.Wedofarmworkastheoldpeasantteachesus.Whenapencilispartlyinaglassofwater,itlooksasifitwerebroken.As(itis)inyourcountry,wegrowwheatinthenorthandriceinthesouth.正如(像)你们国家一样，。,4.引导条件状语从句。主要句式有：,aslongas/solongas只要,e.gAslongasyoustudyhard,youwillmakegreatprogress.,5.引导让步状语从句；作“虽然，尽管”解。这时从句常用倒状语序，即把从句中的表语,状语或动词原形放在as之前。e.g,Childassheis,sheknowsalot.Thoughsheisachild,sheknowsalot.Busyasheis,heinsistsonstudying.Thoughheisbusy,he.Tryashemight,Tomcouldnotgetoutofthedifficulties.Thoughhemighttry,Tomcouldnotgetoutofthedifficulties.,.As作关系代词,1.,引导限制性定语从句，用在“suchas”,“thesameas/thesameas”等结构中，常译作“像一样的人或物”，“凡是的人或物”。e.g,HewishedtobesuchamanasLeiFengwas.,Mybikeisthesameasyours.,2.引导非限制性定语从句，用来指代它前面的整个句子(即先行句)，意思是“这一点”。这个分句可以放在句首，句中，或句末。e.g,Thiselephantislikeasnake,asanybodycansee.,Asiswellknown,oceanscovermorethan70%oftheearth.,3.,若非限制性定语从句位于句首，句中或句末，则用as来引导。e.g,Asweexpected,hecompletedhistaskwithgreatsuccess.,ThecompasswasinventedinChina,asweknownow.,4.,若非限制性定语从句中的谓语动词是besaidbeknown,beexpected,bereported,beannounced等结构时，不论是在句首，句中，句末，都必须as用来引导.e.g,Asisknowntous,TaiwanisapartofChina.,.as作介词,1.作“如，像”解。e.g,Theygotunitedasoneman.Shespokeofmeasherclosedfriend.,2.作“充当，作为”解。e.g,Asawriter,hewasfamous.EnglishisspokenasthefirstlanguagebemostpeopleinAustralia.,3.As作为介词，常和以下动词连用。,regardas/beknownas/considerasuseas/describeas/berememberedasworkas/actas/behonoredas/,Weregardthesunasthesourceofmostformsofenergy.,e.g,.含as的固定词组,1.,assoonas引导时间状语从句。so/asfarasIknow在句中作插入语。意思是“据我所知”。,e.g,As/SofarasIknow,hewillcomeherenextMonday.,aswellas并列连接词组，意思是：“和，同”。当其连接两个并列主语时，谓语动词应与前面的主语在数上保持一致。也可以和短语notonlybutalso进行替换。e.g,2.,Myparentsaswellasmyeldersisterenjoymusic.试比较下面句子。,Myeldersisteraswellasmyparentsenjoysmusic.,TomstudiesJapaneseaswellasChinese.,TomstudiesnotonlyChinesebutalsoJapanese.,aswell译为“也，还”经常放在句尾。与too,also同义词。e.g,3.,Comehereearly,andbringyourbrotheraswell.,soastodosth./soastodosth.引导目地或结果状语。e.g,4.,Hestudieshardsoastopasstheexam.Hewassostrongastocarrytheheavybox.,5.,suchas意为“例如，诸如”可用来引入同位语，举一例或数例说明它与之同位词的词所含的具体内容。,e.g,Therearedifferentformsofenergy,suchasheatenergy,lightenergy,soundenergyandetc.,6.,asto(=asfor/asregards)关于，至于asmuchas/asmanyas“多达，达到至多”e.g,Thereisnodoubtastohishonesty.Hecanearnasmuchas500dollarsaday.,7.,asaresultasaresultof(由于的结果)asawhole(就整体来说)asfollows(如下)asusual(照常)asa(general)rule(通常)asamatteroffact(事实上)asabove(如上)assoonaspossibleasearlyaspossibleasquicklyaspossible,Moreexamples:,Shediedasaresultoftheaccident.Thereasonsareasabove(asfollows).Themachinerunsasusual.Asamatteroffact,airisagas.Hisfathergetsupearlyasarule.,Youshouldimproveyour