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1、万方数据Chapter1Introduction1．1BackgroundoftheresearchCook(2001：147)contendsthatlanguageteael,hngclassroomsflaredifferentfromothersubjectsbecauselanguageisnotju盘themediumbutalsothecontent．Withtheteacl髓asthecentralclasm)0m比∞峨‘'Nofuncti∞alsynabus’‘authentic’material
2、s,ormicrocomputerprogrammec锄replacethecapacityofthelive,fluentspeakertoadjusthiskherspeechtoallappropriatelevelofdifficultyandsolveunpredictablecommunicationdifficultiesfrommomenttomoment,Orto‘scaffold’thelearner’SattemptsatFL(forcigulanguage)Slx燃h．Therefore,t
3、eachertalk,asapartofteacher’sinteractiveskillsisofcrucialimportanceforEnglishlanguagelearners．Nunan(1991：189)holdstheviewthatteachertalkisofvitalirnportancc,notonlyfortheorganizationoftheclassroombutalsofortheprocessesofacquisition,becauseitisthemajorsourceofc
4、omprehensa'bletargetlanguageinputthatthelearnerislikelytoreceive．Thus,itisessentialforEnglishteacherstobemoreawareofteachertalkanddosomeresearch．Withthedevelopmentofeconomicsandtechnology,especiallythewidelyUSeofintemet,theworld犹becoming‘ag
5、obalvillage'．Englis
6、hisusedas‘'theglobalvillage’slinguafranca'’nomalletwhetherinbusinessorinpolitics．Zhu(2003：36)statesthattherealethreemainreasorlsforChinesetounderstandthecurrentsocio-ecDnomicsituationanditsimpactonChinesework：ThefirstOEleisthewidelyUSeofinternet,inwhichEnglish
7、isusedasthedlieflinguafrancaCrystal(1997：107)addsthatEnglishcontinuestobethechieflinguafrancaoftheintemet-apositionwhichisnowbeginningtobeacknowledgedinthepopularmedia．Thesecondoneisthetrendinthechangeofemploymentpatternsinthe218‘centuryintheworld,whichrequire
8、theemployeestohavethebasicabilitytocommunicatewithothersinEnglish．Thethirdoneistheinformationexchange，the叩曲c撕onofscienceandteclmology,andtheemergenceoftransnationalcorporations,whichplacegreatemphasisonmasteringEnglishaSallinternationallanguage．Facingtheserigo
9、roussituations,theChinesegovermnenthasmadeaseriesofed哪。乏由舳alrevolutioninEl啦出education．neyintroducedcommunicativelanguageteachingandsmdcnt-centereda弹roachinthe酬y1990s,既唧Ih笛咖theill巾阻
