As的各種用途

1、As的各種用途在英語里，as這個字神通廣大，有各種用法，下面便是其中九種：一、用作介詞。用作介詞的as1. 表示女口，像。例如:Theygotunitedasoneman./Shespokeofmeasherdearestfriend.2. 表示作為、當(dāng)作。例如：AsaLeaguemember,youshouldthinkmoreofothers.3. 與某些動詞搭配，表示把當(dāng)作，女如lookonas,regardas,treatas,consideras,thinkofas,seeas等。其中consideras中的as可以省略。as與famous或known搭配，表示作為而出名。例Lind

2、aworkedfortheMinnesotaManufacturingandMiningCompany,as3M.A.knowingB.knownC.beingknownD.tobeknown解析：如果熟悉beknownas這一短語，運(yùn)用有關(guān)非謂語動詞的常識，可選出正確答案B。例如：（1）Asthenewmanagerofthecompany,Wilcoxassuredthestaffthathewouldworkforthebenefitsofthecompany.（2）Thesceneryhereisbeautifulasapicture.二、用作表示程度的副詞。例如：修飾形容詞或副詞，表

3、示程度，意為同樣地。例如：Heswimsfast,butIswimjustasfast.但它通常構(gòu)成表示比較的結(jié)構(gòu)asas，notasas。此結(jié)構(gòu)中第一個as是副詞，第二個as是連詞。否定結(jié)構(gòu)中的副詞as可以由so代替。asaspossible/onecan也屬于此用法。例如：Itisgenerallybelievedthatteachingisasmuchanartasitisascience.(3) Youhaveperformedwell.Otherstudentsperformanceisasgood.三、用作連詞的as（一）用作從屬連詞，引導(dǎo)比較副詞從句。例如：（4）Thefrien

4、dshipbetweenusisasstrongasarock.（5）Canourrunnersrunasfastastheyusedto?（二）用作從屬連詞，引導(dǎo)時間副詞從句。例如：1. 引導(dǎo)時間狀語從句，表示當(dāng)?shù)臅r候，其用法與when和while類似。此用法中as多表示從句與主句動作同時進(jìn)行，意為一邊一邊，一般不與狀態(tài)動詞連用。例如：Shesangsongsasshedidherhomework.as還可以表示一動作緊接著另一動作發(fā)生，說明另一動作的結(jié)果，有隨著的含義。例如：Astimewentby,wefoundhewasanhonestman./Ashegrewolder,helost

5、interestineverythingexceptgardening.例1ItwasntuntilnearlyamonthlaterIreceivedthemanagersreply.A.sinceB.whenC.asD.that解析：本題的as中與when一起作為干擾項(xiàng)，容易使考生往時間狀語從句上思考，事實(shí)上本題是強(qiáng)調(diào)句，正確選項(xiàng)是D。（6）Asthenewteacherenteredtheclassroom,thepupilsclappedtheirhands.（7）AlexcaughtsightofNancyasshewasgettingonthebus.（三）用作從屬連詞，引導(dǎo)方式副

6、詞從句。Helookedforward，tothecompletionofthebuilding例如：（8）Youmayactasyouthinkfit.（9）Itissaferforyoutodoasyouaretold.這些由as引導(dǎo)的從句可以節(jié)縮，如:(10) Itissaferforyoutodoastold.(11) Themeetingwillbeheldas(ithasbeen)scheduled.(12) Theweatherhereisnotmildas(itis)inyourcountry.(五) 用作從屬連詞，引導(dǎo)原因副詞從句。引導(dǎo)原因狀語從句，表示由于，因?yàn)?，相?dāng)于be

7、cause,但通常置于句首。例如：1.Asheisaqualifieddoctor,Itrusthisadviceonmedicalmatters.2modelingbusinessisbynomeanseasytogetinto,thegoodmodelwillalwaysbeindemand.A.WhileB.SinceC.AsD.If解析：本題中as干擾性很強(qiáng)，很多考生誤以為是原因狀語從句，但仔細(xì)分析不難發(fā)現(xiàn)正確答案應(yīng)是A(while表示只要)。例如(13)Astheweatherisfine,letsgofishing.(14) WehelpedTony,ashewasagoodman

8、.(六) 用作從屬連詞，引導(dǎo)讓步副詞從句。引導(dǎo)讓步狀語從句，通?？膳calthough或though通用，但語序不同,although或though用于句首，as用于倒裝結(jié)構(gòu)。例如：YoungasIam,IalreadyknowwhatcareerIwanttofollow./Althouglh或Though)Iamyoung,IalreadyknowwhatcareerIwanttofollow.as表示讓步用于倒裝結(jié)構(gòu)，通常將從句的表語、狀語或動詞前置。如果表語有冠詞a/an,需去掉。例如：Greatscholarasheis,heislackingincommonsense./Muchas

9、Ilikeyou,Icouldntlivewithyou.例3hehaslimitedtechnicalknowledge,theolderworkerhasalotofexperience.A.SinceB.UnlessC.AsD.Although解析：as雖然有引導(dǎo)讓步狀語從句用法，但本題不是倒裝結(jié)構(gòu)，故正確答案應(yīng)是D。(15) Improbableasitseems,heisnowManagingDirector.(16) YoungasSamis,hehasperformedhistaskcreditably.（七）用作關(guān)系代詞，引導(dǎo)形容詞從句。1. 引導(dǎo)限制性定語從句，先行詞前通常有

10、as,so,such,same等修飾語。例如：Hesmokesasexpensiveacigaretteashecanafford.Hewillmarryasprettyagirlashecanfind./Myhometownisnolongerthesameasitusedtobe./Asmanypeopleasarepresentwillbegivenapresent.在此種用法中，同學(xué)們要注意與結(jié)果狀語從句的區(qū)別。比如：A:Theteacheraskedussuchadifficultquestionthatnoneofuscouldanswerit.B:Theteacheraskedu

11、ssuchadifficultquestionasnoneofuscouldanswer.A句為結(jié)果狀語從句，而B句則是定語從句。2. 引導(dǎo)非限制性定語從句，用來指代整個主句（即先行句），表示這一事實(shí),那一情況。從句可以位于句首、句中或句末。例如：Asisreportedinthenewspapers,talksbetweenthetwocountriesaremakingprogress.Grammarisnotasetofdeadrules,ashasbeensaidabove.Westandwhenthenationalanthemisplayed,asisthecustom.例6Iex

12、plainedonthetelephone,yourrequestwillbeconsideredatthenextmeeting.A.WhenB.AfterC.AsD.Since解析：根據(jù)句意，選項(xiàng)C是正確答案。as表現(xiàn)的正是本點(diǎn)所講用法。例如：（17）Isthisthesamethingasyoushowedmebefore?（18）Youcanvisitsuchplacesasyouwantto.（四）協(xié)助組成短語與句型。例如：（19）Soasto:Theydepartedearlysoastoreachtheairportearly.（20）Wehavetouchedonthebasicissues.Asforthornyproblems,letslookintothemlater.(21) Aslongasyouwo