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1、Unit5Grammar--ingformasadverbialHesatthere.Hereadanewspaper.Hesatthereandreadanewspaper.Hesatthere,readinganewspaper.Combinethetwosentences:1.V-ing作伴随状语：Whilecrossingthestreet,youmustbecareful.2.V-ing作时间状语：相当于时间状语从句,常置于句首,有时为了突出时间,其前可加_____________等连词.whe
2、n,whileBeingill,hedidn’tgotoschool.Becausehewasill,hedidn’tgotoschool.3.V-ing作原因状语：常置于句首,一般可转化成由____________引导的原因状语从句。as,becauseWorkinghard,I’llsucceedoneday.IfIworkhard,I’llsucceedoneday.4.V-ing作条件状语：(Though)KnowingwhereIlive,henevercomestoseeme.Thoughhe
3、knowswhereIlive,henevercomestoseeme.他怎么还不来呢?5.V-ing作让步状语：Janefelloffthebike,cuttingherleg.Heworkeddayandnight,thusmakinghimselfnear-sighted.6.V-ing作结果状语：Hesatthere,readinganewspaper.Whilecrossingthestreet,youmustbecareful.Beingill,hedidn’tgotoschool.Worki
4、nghard,I’llsucceedoneday.KnowingwhereIlive,henevercomestoseeme.Janefelloffthebike,cuttingherleg.动词-ing作状语V-ing作状语时表示的动作是主语动作的一部分，与谓语表示的动作或状态同时或几乎同时发生的，或是先于谓语动词发生，它的逻辑主语与句子的主语一致。V-ing作状语常表示时间、条件、原因、方式、伴随、让步、结果，多用逗号跟句子其他成分隔开。1.Lookingcarefullyattheground,Im
5、ademywaytotheedgeofthecrater.2.HavingexperiencedquiteafewearthquakeinHawaiialready,Ididn'ttakemuchnotice.Examinethetwosentences:1.Lookingcarefullyattheground,Imademywaytotheedgeofthecrater.grammardiscovery2.HavingexperiencedquiteafewearthquakesinHawaiialr
6、eady,Ididn'ttakemuchnotice.lookmakeatthesametimeexperiencetakenoticebeforehavingdone:anactionhappensbeforethetimeexpressedbythemainverbWhentheyheardaboutthevolcano,theyrandowntothevillage.Afterthescientistshadstudiedtheinformation,theypredictedthatthelava
7、wouldflowthroughthevillage.Hearingaboutthevolcano,theyrandowntothevillage.Havingstudiedtheinformation,thescientistspredictedthatthelavawouldflowthroughthevillage.Rewritethetwosentences:如果V-ing表示的动作发生在句子谓语之前，则要用V-ing的完成式，即是：Having+P.P(过去分词)…,主语+谓语1.Aftersh
8、ehadfinishedherwork,shewenthome.2.Aswehaveinvitedhimheretospeak,we’dbettergotohislecture.V-ing形式的完成式Havingfinishedherwork,shewenthome.Havinginvitedhimheretospeak,we’dbettergotohislecture.PracticeCompletethesentences
