SectionB1a-1d\nRevision:whenvs.while这两个词都有“当……的时候”的意思。when既可指某一点时间，也可以指一段时间；while强调一段时间，所以从句的谓语动词常是延续性的。当when表示“在某一段时间里”的意思时,它可以代替while,但while不能代替when.\ne.g.WhenIcamehome,shewascookingdinner.当我到家时,她正在做饭。Whenyouhangwetclothesnearafire,youwillseesteamrisingfromthem.当你把湿衣服挂在火边时,你会看到水汽从衣上升起。\nThinkofatimewhenyouwerelatefororcouldn’tgotoanevent.Whatwastheevent?Whatwasthereasonwhyyouwerelateorcouldn’tgo?Tellyourpartnerthestory.1a\nListenandwriteshortanswerstothequestions.Whateventhappenedattheschoolyesterday?_____________________________________2.Whomissedtheevent?______________________________________3.Whichteamwonattheevent?______________________________________Therewasabasketballcompetition.Katemissedtheevent.John’steamwon.1b\nListenagain.Numbertheevents[1-6]intheordertheyhappened.____Katesawadogbythesideoftheroad.____Kategottothebusstop.____KatecalledtheAnimalHelpline.____Kateleftthehouse.____Katewaitedforsomeonetowalkby.____Katerealizedherbagwasstillathome.1234561c\nTalkaboutwhyKatemissedtheschoolbasketballcompetition.StudentAbeginsasentencewithwhileorwhen.StudentBcompletesthesentence.A:Whentheschoolbasketballcompetitionstarted...B:Whentheschoolbasketballcompetitionstarted,Katewasstillmakingherwaytoschool.1d\nA:Whentheschoolbasketballcompetitionstarted,whatwasKatedoingatthattime?B:Whentheschoolbasketballcompetitionstarted,Katewasstillmakingherwaytoschool.\nA:WhileKatewasrunningbackhome,whathappened?B:WhileKatewasrunningbackhome,Katesawadogbythesideoftheroad.\nI.单项选择。BExercises1.Imetafriendofmine_____Iwaswalkinginthepark.A.beforeB.whenC.afterD.if2.Whenyouare_____trouble,whynotphonethe_____?A.at;policeB.in;policemanC.in;policeD.at;policemanC\n3.MymotherwascookingwhileI____theradio.A.listenedtoB.havelistenedtoC.waslisteningtoD.islisteningto4._____TVatthattime?A.DidyouwatchB.HaveyouwatchedC.WereyouwatchingD.AreyouwatchingCC\n5.Theyarrived____Paris___awinterevening.A.at;inB.to;onC.in;onD.in;at6.Doyouknow_____?A.whathehappenedB.whatthematteriswithhim.C.whathappenedtohimD.whatdidhehappenedCC\n7.―MypenislostandIcan’tfindit anywhere.―Soyouwillhavetobuy______.A.itB.fewC.oneD.anyC\nWriteashortpassagetotalkaboutthetopicin1a.Previewthenextsection.Homework