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1、连词：but,however,although,whilebut:连接两个并列分句Honeyissweet,butthebeestings.Ioughttohavehelpedher,butIevercould.2.连接两个并列成分Theyseethetreesbutnottheforest.Henolongerfeltdisappointed,buthappyandhopeful.后接状语Hetriedtosaveit,butinvain.Heglancedabout,butseeingonlytheemptyroom.However1
2、.多插在句子中间1)Hisfirstresponsewastosayno.Later,however,hechangedhismind.2)Salesarepoorthismonth.Theremay,however,beanincreasebeforeChristmas.2.有时也放在句首或句尾I’llofferittoTom.However,hemaynotwantit.YouknowallthisaswellasIdo,however.although常用来引导让步状语从句,与though同义Althoughitwasbarelyf
3、ouro’clock,thelightswerealreadyon.Hesaidtheyweremarried,althoughI’msuretheyaren’t.He’sverylovablealthoughnotatalltidy.While常用来引导状语从句，表示对比、让步、时间等。Somecountriesarerich,whileothersareextremelypoor.WhileTom’sverygoodatscience,hisbrotherisabsolutelyhopeless.Whiletheyaremyneigh
4、bors,Idon’tknowthemwell.Whiletheyaremyneighbors,Idon’tknowthemwell.Whilewedon’tagreewecontinuetobefriends.Strikewhiletheironishot.单项填空1.Johnsaveshismoney,_______Georgespendsallhegets.A.whetherB.asC.thoughD.while2.I’dlovetocome______Ican’tmakeittill8o’clock.A.soB.butC.howe
5、verD.while3.____I’mwritingthis,youcanbedoingsomethingelse.A.BeforeB.AfterC.UntilD.While4.______timeswerechanged,BursleywasstillBursley.A.WhetherB.ThoughC.WheneverD.however5.Thesouthofthecountrygrowsricher,______thenorthgrowspoorer.A.WhileB.NeitherC.IfD.although6.____heisv
6、eryold,heishealthy.A.AsB.HoweverC.ThoughD.Whereas7.Britainisnotmountainous,_____Italyis.A.howeverB.whileC.althoughD.unless8.Hewasfeelingbad.Hewenttowork,______,andtriestoconcentrate.A.howeverB.soC.althoughD.while9.Hepromisedtohelpme.____,heisbusyandhasn’tcome.A.WhileB.Alt
7、houghC.HoweverD.Whether10.She’sbeenlearningItalianforsixyears,______shedoesn’tspeakitverywell.A.forB.soC.butD.as11.Theywantedtocharge$5000forthecar,____wemanagedtobringthepricedown.A.butB.soC.whenD.since12.—Somebodywantsyouonthe telephone.—_____nooneknowsI’mhere.A.ForB.An
8、dC.ButD.So13.—Victorcertainlycarestoomuchabouthimself.—Yes.He’sneverinterestedinwhat____isdoing.
