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1、Grammar:TheV-ingisusedastheadverbialReadthefollowingsentencesanddiscovertheusefulstructures1.a.Thechildrenranoutoftheroom,laughingandtalking.b.Seeingnobodyathome,shedecidedtoleavethemanote.2.a.Havingeatentoomuchforsupper,hecouldn'tgotosleep.b.Havingworkedwiththeforeignersforyears,Iknewthemverywell.3
2、.a.Notknowingherphonenumber,wecouldn'tgetintouchwithher.b.Nothavingreceivedareply,hedecidedtowriteanotherletter.4.aWhenvisitingthegreatwall,theymakeasidetriptothenearbyvillages.b.Thoughlivingnearherhouse,Iseldomseeherthesedays..5.a.Theboyleadingtheway,wehadnotroublefindingthestrangecave.b.Therebeing
3、nofurtherbusinesstodiscuss,weallwenthome.小结：二、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.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：Walkin
4、gdownthestreet,IranintoSue.（=WhenIwaswalkingdownthestreet,IranintoSue.）Seenfromthetopofthebuilding,thehouselookslikeamatchbox.(=Whenthehouseisseenfromthetopofthebuilding,itlookslikeamatchbox.)三．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（主语）之间常构成主谓关系，即主动关系。动词---ing形式（短语）的完成式所表示的动作发生在（
5、谓语）动作之前动词---ing形式（短语）的否定形式常在其（前面）加not四．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.五．动词---ing形式（短语）可有其独立的逻辑主语这种主语常常是（名词）或代词主语，置于动词---ing形式之前，二
6、者构成独立主格结构。巩固练习1.将v-ing改写成状语从句1.）Havingexperiencedearthquakesbefore,Iwasn'tfrightened.2.）Comingoutofmyhouse,Isawthevolcanoerupting.3）Wakingupinthemiddleofthenight,shesawherroomwasasbrightasday.4.）Havingspentallnightreadingthedocuments,iwasverytiredthenextday.5.）Havingstoppedthecar,wefoundourselvestra
7、ppedinthickfogandcouldn'tseeclearlyahead.6.）Havingneverseenarainbowbeforeasachild,hewasveryexcited.2.判断句子正误并改正1）Openingthewindow,abutterflyflewintomyroom.2.）Workinghardwithastrongwill,yourdreamwillcer
