SectionⅢGrammar—动词-ing形式作状语语法图解探究发现①Will,stillwatching,sawthecatbehavecuriously.②Whenithadgonepasthecrossedtheroad,keepinghiseyesonthespotwherethecathadbeeninvestigating.③Whilesittingbyapool,Ferdinandseesafrog.④Beforeleavinghiskingdom,hecallshissontohim.⑤Notknowingheraddress,Ican'twritetohertoexpressmygratitude.⑥Havinglivedwiththegirlfor5years,weallknowherverywell.[我的发现](1)六个例句中的动词ing形式的逻辑主语都是句子的主语。(2)由例句⑤可知，动词ing形式的否定式是在ing形式前面加not。(3)在例句③中，动词ing形式短语前用while，为了强调与谓语动词的动作同时发生；在例句④中，动词ing形式短语前用before，为了强调在谓语动词的动作之前发生。(4)由例句⑥可知，动词ing形式的完成式为having_done。一、基本用法动词ing形式作状语时，通常都表示主语正在进行的另一个动作(即动词ing形式与主语在逻辑上存在主动关系)，用来对谓语动词表示的动作加以修饰或作为陪衬，它可表示时间、原因、条件、让步、结果、方式或伴随动作，相当于相对应的状语从句或and引导的并列句。1．作时间状语。通常放在句首，有时在句中或句末，相当于when或while等引导的时间状语从句。Puttingonhisclothes(Afterheputonhisclothes),Billwentoutinahurry.穿上衣服后，比尔匆忙离开了。[即时演练1]句型转换①Whenshesawnobodyathome,shedecidedtoleavethemanote.→Seeing_nobody_at_home,_shedecidedtoleavethemanote.②Arrivinghome,hefoundthedoorlocked.→When_he_arrived_home,_hefoundthedoorlocked.③Whenshearrivedattheparty,shefoundallthepeoplegone.→On_arrivingattheparty,shefoundallthepeoplegone.2．作原因状语。通常放在句首，相当于as,because,since,nowthat等引导的原因状语从句。Beingill(Ashewasill),hecouldnotwalkanyfurther.因为生病，他不能再往前走了。[即时演练2]用所给词的适当形式填空①Knowing(know)theplaceverywell,Iactedastheirguide.②Being(be)anxiousabouthischild'ssafety,hecouldn'tfallasleep.③(福建高考改编)Pressedfromhisparents,andrealizing(realize)thathehaswastedtoomuchtime,theboyisdeterminedtostopplayingvideogames.3．作条件状语。可以在句首也可在句末，相当于if,unless引导的条件状语从句。Heatingwater,wecanchangeitintovapor.把水加热，我们可以将其变为水蒸气。[即时演练3](1)用所给词的适当形式填空①Working_(work)hardatyourlessons,youaretosucceed.②Seeing(see)fromthetopoftower,youwillgetagoodview.③(北京高考改编)Sitdown,Emma.Youwillonlymakeyourselfmoretired,keeping(keep)onyourfeet.(2)完成句子①Reading_carefully(仔细阅读),you'lllearnsomethingnew.②Playing_all_day(整天玩),youwillwasteyourvaluabletime.4．作让步状语。多放在句首，相当于一个让步状语从句。Knowingallthis,theystillmademepayforthedamage.尽管知道了一切情况，他们还是要我赔偿损失。KnowingwhereIlive,henevercomestoseeme.尽管知道我住哪里，他从来也没有来看我。[即时演练4]句型转换①Althoughtheyplayedwell,theylostthegame.→Playing_well,_theylostthegame.②Knowingthatitwasdangerous,shewalkedhomebyherself.→Shewalkedhomebyherself,although_she_knew_that_it_was_dangerous.5．作结果状语。通常位于句末且中间有逗号，相当于一个并列分句。Theboyranevenfaster,reachingtheschooloutofbreath.那个男孩跑得更快了，到达学校时累得上气不接下气了。(2017·天津高考)Thehospitalhasrecentlyobtainednewmedicalequipment,allowingmorepatientstobetreated.这家医院最近得到一批新的医疗设备，这使更多的病人能够得到治疗。[名师点津]动词ing形式作结果状语，表示自然而然的结果。而不定式作结果状语则表示出乎意料的结果，且常与only连用。[即时演练5]用所给词的适当形式填空①Ibuiltallmyhopesonhispromises,onlyto_find(find)thathewasnotanhonestperson.②Thebookso...
