Unit5ThePowerofNature---discoveringusefulstructuresReadthefollowingsentencesanddiscovertheusefulstructures1.a.Thechildrenranoutoftheroom,laughingandtalking.b.Seeingnobodyathome,shedecidedtoleavethemanote.2.a.Havingeatentoomuchforsupper,hecouldn'tgotosleep.b.Havingworkedwiththeforeignersforyears,iknewthemverywell.3.a.Notknowingherphonenumber,wecouldn'tgetintouchwithher.b.Nothavingreceivedareply,hedecidedtowriteanotherletter.4.a.Whenvisitingthegreatwall,theymakeasidetriptothenearbyvillages.b.Thoughlivingnearherhouse,iseldomseeherthesedays.5.a.Theboyleadingtheway,wehadnotroublefindingthestrangecave.b.Therebeingnofurtherbusinesstodiscuss,weallwenthome.补充一、动词---ing形式作时间，条件，原因，让步等状语时，可转换为对应的状语从句。如：Hearingthenews(=Whensheheardthenews),sheburstintotears.Notfeelingwellthatmorning(=Ashewasn'tfeelingwellthatmorning),hewenttoseethedoctor.practice二、动词--ing形式作状语时，其逻辑主语与句子的主语要一致，与其逻辑主语之间是主动关系；而过去分词作状语时，与其逻辑主语之间是被动关系。如：Walkingdownthestreet,IranintoSue.Seenfromthetopofthebuilding,thehouselookslikeamatchbox.动词---ing形式（短语）作状语，可表示时间、条件、原因、让步、方式或伴随情况等，动词--ing形式所表示的动作与（）之间常构成主谓关系，即主动关系。主语动词---ing形式（短语）的完成式所表示的动作发生在（）动作之前谓语动词---ing形式（短语）的否定形式常在其（）加not前面动词---ing形式（短语）作状语，其前往往可以加when,while,if,unless,once,although,asif等连词，构成“连词+动词--ing形式”结构。又如：Whilewaitingthere,hesawtwoprettygirlscomeoutofthebuilding.Theytalkedandlaughedasifhavingbeenfriendsformanyyears.动词---ing形式（短语）可有其独立的逻辑主语这种主语常常是（）或代词主语，置于动词---ing形式之前，二者构成独立主格结构。名词rewritethefollowingsentences1.Havingexperiencedearthquakesbefore,iwasn'tfrightende.2.Comingoutofmyhouse,Isawthevolcanoerupting.3.Wakingupinthemiddleofthenight,shesawherroomwasasbrightasday.4.Havingspentallnightreadingthedocuments,iwasverytiredthenextday.5.Havingstoppedthecar,wefoundourselvestrappedinthickfogandcouldn'tseeclearlyahead.6.Havingneverseenarainbowbeforeasachild,hewasveryexcited.BecauseIhadexperiencedearthquakesbefore,iwasn'tfrightende.AsIcameoutofmyhouse,Isawthevolcanoerupting.Whenshewokeupinthemiddleofthenight,shesawherroomwasasbrightasday.BecauseIhadspentallnightreadingthedocuments,Iwasverytiredthenextday.Afterwehadstoppedthecar,wefoundourselvestrappedinthickfogandcouldn'tseeclearlyahead.Asthechildhadneverseenarainbowbefore,hewasveryexcited.1.Openingthewindow,abutterflyflewintomyroom.2.Workinghardwithastrongwill,yourdreamwillcertainlycometrue.判断句子正误并改正Openingthewindow,Isawabutterflyflyingintomyroom.误误Workinghardwithastrongwill,you'llcertainlymakeyourdreamcometrue.对比练习1.________manytimes,buthestillcouldn'tunderstandit.2.________manytimes,hestillcouldn'tunderstandit.A.HavingbeentoldB.ToldC.HewastoldD.Thoughhehadbeentold3.______fromspace,theearthlooksblue.4.______fromspace,wecanseetheearthisblue.A.SeenB.SeeingC.ToseeD.SeeCAAB根据汉语意思，用动词--ing形式（短语）将下列句子补充完整。（每空一词）1.由于生病，我不得不呆在家里。____________,Ihadtostayathome.2.他把咖啡杯掉在地上，摔得粉碎。Hedroppedthecoffeecup,_____________________3.过马路的时候要小心些。When________________,pleasebecareful.4.听到这个消息我们都高兴的跳了起来。______________,wealljumpe...
