©1994-2009ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(,425006):,,:;;;;:H313:A:1008-2611(2004)03-0143-02CorderCorder(transitionalcompetence)(idiosyncraticdialect);1969,LarrySelinker(LanguageTransfer)Interlanguage;1971,W.Nemser(approximativesystem);1972,Selinker(Interlanguage),,,,,:;,;,,,,,Selinker,,()(Languagetransfer),,,(positivetransfer)(negativetransfer)()(Overgeneralization),,,,,-sfoot,foots()(Transferduetotheeffectsofteaching),,,;he,she,shehe()(Learningstrategies)(),(proficiency),:(simplification),(reduction),(transfer),(omissions),(substitutions),(restructuring),(formulaiclanguage),()(Communicationstrategies)()(),,,,,Selinker1992,RediscoveringInterlanguage,,,,,,X:2003-12-30:(1969-),,,,:.©1994-2009ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(1987),:(randomerrorstage):,,,(emergentstage):,(systematicstage):,,(stabilizationstage):,,,,,,,,,,,,,(),,,,,(),,,,,,,,,,,,,,,,,,,,,,,,,,:[1]Ellis,Rod.UnderstandingSecondLanguageAcquisition[M].Shanghai:ShanghaiForeignLanguageEducationPress,1986.[2],.[M].:,1996.[3],.[J].,2001,(9):36-39.[4].[J].,2002,(3):24-29.[5].[J].,2001,(5):78-80.[6],.[J].,2000,(2):28-32.InterlanguagePhenomenoninL2AcquisitionPENGNing2hong(ForeignLanguagedepartment,LinglingUniversity,Yongzhou425006,China)Abstract:InterlanguageisoneofthehottopicsinthestudyofL2acquisition.Aninterlanguagesystemisneitherthesystemofthenativelanguagenorthesystemofthetargetlanguage.Itisanindependentandthoroughlylegitimatesystemthatthelearnerconstructs.Itissystematic,permeable,dynamicandfossiliable.IthasadirectinfluenceonL2acquisition.Keywords:interlanguage;L2acquisition;nativelanguage;targetlanguage;languagetransfer4412004