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1、Cet-4常考结构Beaboutto:beonthepointofdoingsth;justgoingtodosth:Herfatherisabouttoretire.AsIwasabouttosay，whenyouinterruptedme.Allbut:1.allbut+a.(verynearly;almost)Crowsallbutdestroyedafarmer’sfieldofcorn.Thehikerswereexhaustedandallbutfrozenwhentheywerefound.2.allbut+n.(allexce
2、pt):AllbutJohnwerepresent.Forall:inspiteof.Hedidnotdowellintherace,forallhistraining.Forallhismoney,hewasveryunhappy.Alternative,n.haveno~buttodo.Ihaveno~buttowalkout.There’sno~buttofight.And:省if的条件句中.Fiveminutesearlier,~wecouldhavecaughtthelasttrain.TurnontheTVoropenamagaz
3、ine~youwilloftenseeadsshowinghappyfamilies.Anythingbut:notatall;farfrom.作表语+n./a./p.p.:He’sanythingbutlazy/ahero.Thebridgeisanythingbutsafe/finished.Aloneinadesertedhouse,hewassobusywithhisresearchworkthathefelt~lonely.As:1.although1)a./ad.+as+主语+谓语:YoungasIam,Iknowsomeofth
4、efamilysecrets.MuchasIlikeher,Iwillnotmarryher.Somemembersofthestaffcouldn’thandlethecase,hardastheytried.2)V+as+主语+may/might/will/would:Tryashewould,hecouldnotlifttherock.Therewasnotasoultobefoundinthehouse,searchastheywould.2.关系代词1)such…as(as接近于who/that/which):Suchwomenas
5、Tomknewthoughthewascharming.Ineverheardsuchstoriesashetells.Heneverhesitatestomakesuchcriticismsasareconsideredhelpfultoothers.Itwasn’tsuchagooddinnerashshehadpromisedus.212)thesame…as:Hedoesn’tbelievethesamethingasyoudo.3.as+be+表语:Heisabsent,asisoftenthecase.Freddie,asmigh
6、tbeexpected,wasattendingtheconference.Aswasexpected,heperformedthetaskwithsuccess.Asisknowntotheworld,MarkTwainisagreatAmericanwriter.Asisgenerallyaccepted,economicalgrowthisdeterminedbythesmoothdevelopmentofproduction.4.as用于省略句，代替表语和宾语:Davidistall,asaremybrothers.（正常语序asmy
7、brothersare.）TheSecondWorldWar,asdidtheearlieroneof1914,promotedpublicconcernaboutaphysicalandintellectualwell-beingofthecountry’shumanresources.5.as用于省略句，引起分词短语作状语:Asexpected,theafforestationmovementrapidlyspread.Itusuallyhappensasdescribedabove.Hehadfailedtovisitherasprom
8、ised.6.asmuch…as;notsomuch…as;notso/as+a.+as:Hesaidthesituationtherewasnotsobadash
