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1、AcknowledgementsManypeoplehavemadeinvaluablecontributions,bothdirectlyandindirectly,tomyresearch.Ifeeldeepgratitudetoallthosewhohaveofferedmesupport,helpandencouragementduringmystudyinJiangsuUniversityofScienceandTechnology.Firstofall,Iamobligedtoexpressmysinceregratitudetomysuper
2、visorProfessorZhaoXiawhohasgivenmealotofguidanceinmystudyofcognitivelinguistics,andmadepainstakingeffortstoinstructmeinthethesis-writing.Herkindnessandefficiencywilldefinitelyexertprofoundinfluenceonmyfuturelifeandwork.MydeepthanksmustgotoProfessorChengShanzhen,ProfessorZhouShujun
3、,ProfessorGeJihong,ProfessorDaiYuqun,ProfessorZhangHongyan,ProfessorXiaGanlinandProfessorJiangWei,fortheirinstructivelecturesthatIhaveattended.Ishouldalsoexpressmygenuinegratitudetomywife,myclassmatesandroommateswhohavehelpedmeduringtheseyears.Lastbutnotleast,thethesisowesitsexist
4、ence,toalargeextent,toalargebodyofrelatedmaterials.Mybibliography,inthisrespectcanberegardedasthemostgenuineactofthankstotheauthorsofthosematerials.AbstractAbstractLexicalpolysemyisthemostpervasiveandthemostimportantsemanticphenomenoninEnglish.Therefore,ithasbeenthefocusoflinguist
5、s’researches.Thetraditionalstudiesareconfinedtotheexternalreasonsthatcausethechangesofmeaningsofpolysemouswordswithouttakingaccountoftheirunderlyingcognitivemechanisms.Theyfailtorevealtheessentialnatureofpolysemouswords.Thepolysemousphenomenonhasattractedmuchconcernofcognitiveling
6、uiststoo.Someofthecognitiveresearchersfocusedtheirmindstoomuchontheclassificationofthesemanticsystemofpolysemouswords(王德春,2002).Otherslaytheiremphasisontheanalysisofpolysemousperceptionwordsorbodily-partwordssuchashandorheart.However,theresearchwhichsystematicallystudiesinternalse
7、manticrelationsofpolysemouswordsandexplainsthenatureofthedevelopmentofthemeaningsofpolysemouswordsisstillrareintermsofcognitivelinguistics.Thisthesisconductsastudyofpolysemouswordsfromacognitiveperspectivewithintherelevanttheoreticalframeworkofcategorizationandprototype,metaphor,m
8、etonymyandimageschema,thegoalofwh
