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1、上海外国语大学博士学位论文英语临界助动词构式变化研究院系：英语学院学科专业：英语语言文学姓名：孟庆楠指导教师：李基安2018年12月ShanghaiInternationalStudiesUniversityTHECONSTRUCTIONALCHANGESOFENGLISHMARGINALAUXILIARIESADissertationSubmittedtotheSchoolofEnglishStudiesInPartialFulfillmentoftheRequirementsforTheDegreeofDoctorofPhilosophyByMen
2、gQingnanUndertheSupervisionofProfessorLiJi’anDecember2018答辩委员会成员主席：邹申上海外国语大学教授成员：张健上海外国语大学教授郑新民上海外国语大学教授刘芹上海理工大学教授郑佩芸上海第二工业大学教授AcknowledgementsThisdissertationwouldnothavebeenaccomplishedwithoutthegeneroushelpofmanypeopleincludingbutnotlimitedtothefollowingones.Mydeepestgratitud
3、egoesfirstandforemosttomysupervisor,ProfessorLiJi’an,forhisacademicguidanceandthoughtfulcommentsonthepreviousdrafts,especiallythefinalizedversionofthisdissertation.Tillnow,IcouldstillremembercrystalcleartheexcitementwhenIwasinformedtobeformallyrecruitedashisPhDstudentinthespring
4、of2015.WordsfailmethathowgratefulIamtohimforaffordingmesuchagreatopportunitytocomebacktomyalmamaterfouryearsaftermyB.A.graduation.Inaddition,itisProfessorLiwhodirectsmetothedomainofconstructiongrammarafterviewingsomeofmyimmaturedraftsforjournalarticles.Withouthispenetratinginsig
5、hts,Imayprobablystillbestuckinthemuddyswampofpedagogicalgrammar,andmayneverhaveachievedsuchaheight.Second,IwouldliketoextendmyheartfeltthankstoAssociateProfessorZhangWeiwei,ayoungandprolificresearcheratInstituteofLinguistics(SISU)andcurrentlyapost-docatKULeuven.Itwasinherclassth
6、atIhadabasicunderstandingofthoseadvancedmultivariatestatisticaltechniquesforquantitativelinguisticstudies,andrealizedthechallengingbutfulfillingroadsahead.Meanwhile,itwasexactlyatthattimethatImadeupmymindtovisitLeuveninmythird-yearPhDstudies.Withouther,ImayneverhaveheardofLeuven
7、,letalonetospendagoodyearandmeetsomanydistinguishedscholarsthere.Third,IwouldalsoliketoexpressmygratitudetoalltheprofessorswhohavehelpedmeatKULeuven(Belgium)duringmyresearchstayinthepast12months,especiallymyco-supervisorProfessorHubertCuyckens,aworld-renownedhistoricallinguist,w
8、honotonlyallowedmetoauditthreeofhiscourses,buta
