高三 As引导地从句

苏州个性化教育中心

XueDaPersonalizedEducationDevelopmentCenterPAGEPAGE１个性化教案学科：高中英语课时计划：2课时年级：高三课题：As引导的从句学生姓名：教师姓名：陈莉教学目标As引导的从句教学重点As引导的从句教学难点准确区分As引导的从句授课类型归纳总结课教学过程教师活动一、课堂导入通过复习学习过的各种从句引入as的不同特殊用法。二、知识讲解As引导的从句一、As引导让步状语从句

As引导的让步状语从句必须倒装（though和as意思相同，不过though引导让步状语从句可倒装也可以不倒装），归纳为以下五种句型：1、名词+as/though+主语+动词

Kingashewas，hewasunhappy.他虽是国王，但他并不幸福。Childasheis，heknowstohelpother.他虽是个孩子，却知道帮助别人。

【说明】其中的动词通常为连系动词，也就是说位于句首的名词是其后连系动词的表语。另外，要特别注意位于句首的名词前习惯上不用冠词，即使其前有形容词修饰也不用冠词。比较：Boyas［though］heis，helikestoplaywithgirls.=Thoughheisaboy，helikestoplaywithgirls.他虽是男孩，却喜欢与女孩子玩。Strongmanas［though］heis，GeneralBothahasbeenseverelyputtothetestduringthepastfewweeks.=Thoughheisastrongman，GeneralBothahasbeenseverelyputtothetestduringthepastfewweeks.波赛将军虽然坚强，但在过去的数周里也受到了严峻的考验。2、形容词+as/though+主语+动词

Successfulasheis，heisnotproud.他虽然成功，但不骄傲。Improbableasitseems，it’strue.虽然看起来不太可能，但却是真的。Stupidasitsounds，IwassoinlovewithherthatIbelievedher.尽管听起来很愚蠢，我是如此爱她竟然相信了她的话。Patientashewas，hedidn’tlikewaitingthatlong.他虽说有耐心，也不愿等这么长。Beautifulthoughthenecklacewas，wethoughtitwasover-priced.那条项链虽然很漂亮，我们认为价钱太高。【说明】其中的动词也通常为连系动词，也就是说位于句首的形容词是其后连系动词的表语。3、副词+as/though+主语+动词MuchasIlikeParis，Icouldn’tlivethere.尽管我喜欢巴黎，但我不能住在那里。Hardthoughtheytried，theycouldn’tmakeherchangehermind.尽管他们做了很大努力，却没法让她改变主意。Fastasyouread，youcan’tfinishthebookintwodays.尽管你读得很快，你总不能在两天之内就读完这本书。Hewasunabletomakemuchprogress，hardashetried.尽管他做了努力，却未能取得很大进步。【说明】有的词典将muchas作为习语看待，认为它是一个用以引导让步状语从句的复合连词。再如：MuchasIadmirehimasawriter，Idonotlikehimasaman.他作为一名作家我很佩服他，但我却不喜欢他这个人。MuchasIlikeyou，Icouldn’tlivewithyou.我尽管很喜欢你，却不能和你在一起生活。4、动词原形+as/though+主语+动词Objectasyoumay，I’llgo.纵使你反对，我也要去。Tryashemight，hecouldn’tsolvetheproblem.尽管他想方设法，却未解决这个问题。Searchastheywould，theywouldfindnobodyinthehouse.无论怎样搜查，他们在房子里仍然没有找到一个人。Dislikehimaswemay，wemustacknowledgehisgreatness.尽管我们不喜欢他，但必须承认他的伟大。LosemoneyasIdid，wegotalotofexperience.钱虽然丢了，我们却得到了许多经验。Failintheelectionashedid，hebecamefamousforhisfieryspeechagainstslavery.尽管落选了，但他却以其反对奴隶制的激烈演说而出了名。【说明】主语后的动词通常为may，might，would，did等情态动词或助动词(若表示情态意义，则选用情态动词；若陈述事实，则用did，do等助动词)。5、分词+as/though+主语+动词Raininghardasitis，I’mgoingoutforawalk.虽然正在下着大雨，我还是要出去散步。Surroundedaswewerebytheenemy，wemanagedtomarchforward.虽然我们被敌人包围着，但我们还是设法前进了。Munchingtheappleashewas，hehadgotaneyeforallJohn’smovements.他尽管在一个劲地嚼着苹果，但仍警惕着约翰的一举一动。6、补充说明1）这类倒装的让步状语从句可用as，though来引导，不能用although来引导；但是，未倒装的让步状语从句却可用though，although来引导，而不能用as来引导。也就是说，although引导让步状语从句时不能倒装，as引导让步状语从句时必须倒装，而though引导让步状语从句时可以倒装也可以不倒装。如：虽然很晚了，但我们还是继续工作。正：Lateas［though］itwas，westillwentonworking.正：Thoughitwaslate，westillwentonworking.误：Latealthoughitwas，westillwentonworking.误：Asitwaslate，westillwentonworking.2）上面提到的倒装结构有时也可用来表示原因，区别的办法主要看句子的内容：让步从句的内容大多数与主句在意义上相反，而原因从句则与主句之间有因果关系。比较：Tiredashewas，hesatuplatestudyingatnight.昨晚他虽然很疲倦了，但还是学习到很晚才睡。(表让步)Tiredashewas，hewenttobedearly.因为很累，所以他睡得很早。(表原因)Youngashewas，hewasequaltothetask.他虽年轻，却能胜任这项工作。(表让步)Youngashewas，hewasnotequaltothetask.他因为年轻，所以不能胜任这项工作。(表原因)3）在美国英语中，人们通常用as...as引导让步状语从句。如：Coldasitwas，wewentout.=Ascoldasitwas，wewentout.尽管天气冷，我们还是出去了。Successfulasheis，heisnotproud.=Assuccessfulasheis，heisnotproud.他虽成功了，但不骄傲。

as引导时间状语从句as引导的时间状语从句,可以表达“正当……”，“一边……一边……”，“随着……”等意思。1.表示某事一发生，另一事立即发生。Asthesunrose,thefogdisappeared.2.表示在某事发生的过程中，另一事发生。Justashewasspeakingtherewasaloudexplosion3.表示两个动作同时发生。Helensangasongasshewashed.表示“随着…..”.常指一个行为是另一个行为的结果，或一种状态随另一种状态变化。句中的动词多表示状态的发展变化。Asshegrewolder,shebecamemorebeautiful.as引导原因状语从句as引导的原因状语从句一般比because语气轻，多表示不谈自明的原因。Ashewasnotwell,Idecidedtogowithouthim.as引导方式状语从句、as引导的方式状语从句as一般指“按照、正如”之意，asif意为“好像”。a.WemustdoasthePartytellsus.b.Leavethethingsastheyare.c.Mostplantsneedsunlightjustastheyneedwater.d.Itsoundsasifitisraining.e.Aswateristofish,soairistoman.As引导比较状语从句:asas,notasasa.Theyjumpedupanddownashardastheycould.b.ThejobisnotsodifficultasIthoughtitwouldbe.六、as引导定语从句

as的用法:(as引导定语从句,在定语从句中作主语、宾语、表语)

(一)如为限制性的，多用于thesame…as;thesameas；such…as…;asmany/muchas；so…as等结构中。如：1.Ihavethesamebookasyou(have).我有一本和你的一样的书。

Herattitudetohimwasquitethesameasithadalwaysbeen.(关系代词as和指示代词same连用,在从句中用作表语,先行词是same.)

2.Whydidn'tyoumentionthatinfaceofthepolicejustnow?Ithoughtitwassuchaminordetailaswashardlyworthmentioning.

Wewillonlydiscusssuchproblemsashavesomethingtodowithourowninterests.Don'tdosuchthingsasyouarenotsureabout.Thereisnosuchplaceasyoudreamofinallthisworld.比较：Iliveinthesamehousethatheusedtolivein.

I'mwearingthesameshirtasyouworeyesterday.比较：Hereissobigastoneasnoonecanlift.（定语从句）

Hereissobigastonethatnoonecanliftit.（结果状语从句）

(二)如为非限制性的，多单独引导一个定语从句，这种定语从句可置于句首，句中或句尾，译为"正如，这一点"。（动词常为know,see,expect,pointout,etc.）1.Asweallknow,smokingisharmfultoone'shealth.(as作宾语)=Asisknowntoall,smokingisharmfultoone'shealth.（as作主语）=It'sknowntoallthatsmokingisharmfultoone'shealth.或:Smokingisharmfultoone'shealth,asweallknow.（as作宾语）或:Smoking,asweallknow,isharmfultoone'health.2.Hewasaforeigner,asIknewfromhisaccent.

(宾语,先行词是前面整个句子)当先行词被thesame所修饰时，关系词既可以用as，也可以用that。在表示具体事物时，有时两者有一定的区别。一般说来，表示同一种类多用as，表示同一事物多用that。如：ThisisthesameinstrumentthatIusedyesterday.这就是我昨天用过的那台仪器。ThisisthesameinstrumentasIusedyesterday.这台仪器跟我昨天用过的那台一样。在抽象概念上，同种类和同一事物是没有绝对区别的，所以两个词可换用：Ihavethesameopinionas/thatyouhave.这里要注意的是：（1）使用as时，它引导的定语从句中的动词可以省略，但使用that时，定语从句中的动词不可省略。如：Womenreceivedthesamepayasmen.Womenreceivedthesamepaythatmenreceived.(2)在“thesame…that”结构中，that只是用来加强语气，强调“相同”。that可以省去而不改变句子原意，甚至连名词前的same也可以省去。如：ThisisthesameinstrumentthatIusedyesterday.=ThisisthesameinstrumentIusedyesterday.=ThisistheinstrumentIusedyesterday.但在“thesame…as”结构中，same和as都不能省略。(3)当“thesame…that”结构中的that作为关系副词用时，不可以直接与as互换。如：HelivesinthesamebuildingthatIlive.=Helivesinthesamebuildingas/thatIlivein.Shallwemeetatthesameplacethatwelastmet?=Shallwemeetatthesameplacethat/aswelastmetat?7.当先行词前有such,so,as时，关系词应当用as。如：Awisemanseldomtalksaboutsuchthingsashedoesn’tunderstand.HespokeinsucheasyEnglishaseverybodycouldunderstand.Atthistimeoftheday,allbusesandtrolleyshavetocarryasmanypassengersastheycan.Itissoeasyabookaseveryschoolboycanread.Let’sdiscusssuchthingsaswecantalkoffreely.另需注意：ThisbookiswritteninsucheasyEnglishasbeginnerscanunderstand.（定语从句）ThisbookiswritteninsucheasyEnglishthatbeginnerscanunderstand.（结果状语从句）课堂练习1.Shesang______sheworked.A.AsB.sinceC.AssoonasD.While2.Smart______heis,hedoesn’tstudyhard.A.althoughB.sinceC.AsD.While3.Youmusttrytodo______Idid.A.whatB.asC.thatD.while4.Shedoesn’tdoherworkascarefully______I.A.withB.sinceC.asD.While5.______shewaslateforclass,shehadtosaysorry.A.ForB.SinceC.AsD.While6.______thedaywenton,theweathergotworse.A.WhenB.BeforeC.AsD.While7.You’dbetterwearstrongshoes_____we’lldoalotofwalking.A.forB.sinceC.nowthatD.as8.Iwanttousethesamedictionary______wasusedyesterday.A.whichB.whoC.whatD.as9.Heisn'tsuchaman______heusedtobe.A.whoB.whomC.thatD.as10..HeisgoodatEnglish,______weallknow.A.thatB.asC.whomD.what11.Idon'tlike______asyouread.A.thenovelsB.thesuchnovelsC.suchnovelsD.samenovels12.Ihaveboughtsuchawatch_______wasadvertisedonTV.A.thatB.whichC.asD.it13.Heisnotsuchaman_______wouldleavehisworkhalfdone.A.thatB.whichC.whoD.as14.Iwanttousethesametools_______usedinyourfactoryafewdaysago.A.aswasB.whichwasC.aswereD.which15.Johngotbeateninthegame,_______hadbeenexpected.A.asB.thatC.whatD.whoKeys:ACBCCCDDDBCCDCA课后作业1._______isknowntoeverybody,themoontravelsroundtheearthonceeverymonth.A.It B.AsC.That D.What2.________ismentionedabove,thenumberofthestudentsinseniorschoolisincreasing.A.Which B.AsC.That D.It3.Theresultoftheexperimentwasverygood,__________wehadn’texpect.A.when B.thatC.which D.what4.Johnsaidhe’dbeenworkingintheofficeforanhour,__________wastrue.A.he B.thisC.which D.who5.Hemadeanotherwonderfuldiscovery,__________ofgreatimportancetoscience.A.whichIthinkis B.whichIthinkitisC.whichIthinkit D.Ithinkis6.＿＿＿＿isknowntoeveryone,themoontravelsroundtheearthonceeverymonth.A.ItB.AsC.ThatD.What7.＿＿＿airistoman,soiswatertofish.A.SinceB.JustC.LikeD.As8.Wemustdotheexperimentcarefully＿＿＿MissLiutoldus.A.whatB.sinceC.asD.while9._____,Carolinacouldn’tgetthedooropen.A.TryasshemightB.AsshemighttryC.ShemightastryD.Mightsheastry10.___Iexplainedonthephone,yourrequestwillbeconsideredatthenextmeeting.A.WhenB.AfterC.AsD.Since11.Danbyleftwordwithmysecretary______hewouldcallagainintheafternoon.A.whoB.thatC.asD.Which12.Allthedishesinthismenu,_______otherwisestated,willservetwotothreepeople.A.asB.ifC.thoughD.unless13.______hetalksalotabouthisfavoritesingersafterclass.A.quietstudentashemaybeB.QuietstudentashemaybeC