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总结
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归纳】but与however都表示“但是,然而”,都可以引导并列句,但二者用法有些区别。1.从语义上看,but所表示的是非常明显的对比,转折的意味较however要强。2.从语法上看,but是个并列连词,而however是个连接副词。3.从语序上看,but总是位于它所引出的分句之首,而however却可位于分句之首、之中或之尾。4.从标点上说,but之后一般不使用逗号,但however则通常用逗号与句子其他部分分开。but,howeverHeknowssomanydifficultiesareinfrontofhim.Hewillnot,________,giveup.howeverwhile的用法1.表示对比,意为“而;然而”。2.引导时间状语从句,意为“当……时候;在……期间”,强调某一段时间内主句和从句的动作在同一时期发生,while从句中的动词通常是持续性动词。Heisshort,whilehisbrotheristall.Whilemymotherwascooking,thephonerang.3.引导让步状语从句,意为“虽然,尽管”,多放在句首。Whileheisalittlechild,heknowsmanythingsaboutknowledge.While/Although/Thoughalthough的用法although为从属连词,意为“虽然,尽管”,引导让步状语从句。注意以下两点:1.although在大多下数情况下可与though通用,但though可用于一种不以其为首的让步状语从句,这种从句须以形容词、名词或动词(原形)等开头,整个从句须置于主句之前。这时although不能替换though。Tiredthoughhewas,hewentonworking.2.although/though所引导的从句不能与but,and,so,however等连用,但可以和副词yet,still等连用。Although/thoughheisalittlechild,butheknowsmanythingsaboutknowledge.Although/thoughheisalittlechild,heknowsmanythingsaboutknowledge.正确表达Although/thoughheisalittlechild,yetheknowsmanythingsaboutknowledge.正确表达错误表达—HaveyoubeentoNewZealand?—No,I’dliketo,_____.A.tooB.thoughC.yetD.eitherIdoeverysinglebitofhousework____myhusband-Bobjustdoesthedishesnowandthen.A.sinceB.whileC.whenD.asOnecan’tfeeltheair;_________,itdoesexist.2.Thechildrenwereplayingoutside_____Marywaswritingaletter.3._________myuncleisold,helooksverystrongandhealthy.howeverwhileAlthough用but,however,although,though,while填空4.Thecarwasold,_____itwasinexcellentcondition.5.Somepeoplewastealotoffood_____othershaven’tenoughtoeat.6.Ithoughtthosefiguresarecorrect.________,Ihaverecentlyheardthattheywerenot.butwhileHowever