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1、As用法小结as用法归纳as词性多,词义广,用法灵活。现将其用法归纳如下:Ⅰ.as作副词,表示程度,意为“同样地”。在“as…as”,“notas…as”结构中的第一个as是副词,作“和/与…(不)一样”解。e.g①Jackisastallashisfather.②Hedoesn’tspeakEnglishas/sofluentlyasyou.Ⅱ.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.g①Heshoutedaloudasheranalong.②Iwasstartleda
2、sheopenedthedoor.③Wegetwiseraswegetolder.2.引导原因状语从句,与because的用法相近。e.g①Asitwasgettingverylate,wesoonturnedback.②Wemuststopwritingnow,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;justas…as.e.g①WhenatRome,doasRomansdo.②Wedofarmworkastheoldpeasantteaches
3、us.③Whenapencilispartlyinaglassofwater,itlooksasifitwerebroken.★④As(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.g①
4、Childassheis,sheknowsalot.★→Thoughsheisachild,sheknowsalot.②Busyasheis,heinsistsonstudying.→Thoughheisbusy,he….③Tryashemight,Tomcouldnotgetoutofthedifficulties.→Thoughhemighttry,Tomcouldnotgetoutofthedifficulties.Ⅲ.As作关系代词1.引导限制性定语从句,用在“such…as”,“thesame…as/thesameas”“so/as…as”等结构中,e.
5、gHewishedtobesuchamanasLeiFengwas.Theteachergavethestudentssodifficultaproblem___noonecouldworkout.Heisnotthesameman___heusedtobe.①②2.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.g③Thiselephantislikeasnake,asanybodycansee.④Asiswellknown,oceanscovermorethan70%oftheearth.3
6、.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.gAsweexpected,hecompletedhistaskwithgreatsuccess.①②ThecompasswasinventedinChina,asweknownow.4.若非限制性定语从句中的谓语动词是besaid,beknown,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.gAsisknowntous,TaiwanispartofChina.Ⅳ.As作介词1.作“如,像”解。e.g①Theygotuni
7、tedasoneman.②Shespokeofmeasherclosedfriend.2.作“充当,作为”解。e.g③Asawriter,hewasfamous.④EnglishisspokenasthefirstlanguagebymostpeopleinAustralia.3.As作为介词,常和以下动词连用。regard…as/beknownas/consider…asuse…as/describe…as/berememberedasworkas/actas/behonoredas/lookonasWeregardthesunasthesourceofmost
8、forms