but-however-while-although和though用法小结

1/3but,however,while,although和though用法小结【观察】阅读下列句子，注意各句中黑体单词的用法。1.Wehavemadesomeachievements,butweshouldbemodest.2.Hepromisedtohelpme.However,heisbusyandhasn’tcome.3.Shefeltill.Shewenttowork,however,andtriedtoconcentrate.4.Hesaidthatitwasso;hewasmistaken,however.5.Youlikesports,whileI’dratherread.6.WhileIunderstandwhatyousay,Ican’tagreewithyou.7.Although/Thoughitwaslate,shewentonworking.8.Tiredthoughhewas,hewentonworking.9.Althoughhe’sgotagoodjobnow,hestillcomplains.10.Shepromisedtophone.Iheardnothing,though.【归纳总结】★but与however均可表示转折，意为“但是，然而”，都可以引出表转折意义的句子（句1-句4），但二者用法也有区别：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却是个连接副词（句2-句4）。3.从语序上看，but总是位于它所引出的分句之首，而however可位于句首、句中或句尾。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。★连词while的用法2/31.引导表对比关系的并列句，意为“而，然而”（句5）。2.引导让步状语从句，意为“虽然，尽管”，多放在句首（句6）。★although与though的用法1.although与though用作连词时，意为“虽然，尽管”，引导让步状语从句（句7）。although在大多数情况下可与though通用。但在正式文体中，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等开头，整个从句须置于主句之前（句8），这时although不能替换though。2.although/though引导从句时，主句不可再使用but,however等，但可出现副词still等（句9）。3.though可用作副词，意为“可是，不过”，一般放在句末（句10），但although一般不用作副词。【即学即练】从A、B、C、D四个选项中，选出可以填入空白处的最佳选项。1.IwasgladtomeetJennyagain,_____Ididn’twanttospendalldaywithher.(2013新课标全国卷II)A.butB.andC.soD.or2.There’snowayofknowingwhyonemanmakesanimportantdiscovery_____anotherman,alsointelligent,fails.(2013新课标全国卷I)A.sinceB.ifC.asD.while3._____small,thecompanyhasabout1,000buyersinover30countries.(天津2013)3/3A.AsB.IfC.AlthoughD.Once4.QueenElizabethⅡisoftenthoughttobetherichestwomanintheworld._____,herpersonalwealthseemsrathersmall.(安徽2012)A.BesidesB.OtherwiseC.HoweverD.Altogether5._____IalwaysfeltIwouldpasstheexam,IneverthoughtIwouldgetanA.(湖南2012)A.WhileB.OnceC.IfD.Until答案【即学即练】1-5ADCCA