I wish to express my thanks to my leader, dean of the Department of AppliedLinguistics, Capital Medical University. She encouraged me constantly to finish thestudy.

　　At last, I want to thank my husband and other family members and relatives,who showed their concern and support when I pursued my study.

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　　I would like to express my gratitude to all those who helped me during the writing of this thesis. I gratefully acknowledge the help of my supervisor, Ms. Sun Yanlan, who has offered me valuable suggestions in the academic studies. In the preparation of the thesis， she has spent much time reading through each draft and provided me with inspiring advice. Without her patient instruction, insightful criticism and expert guidance, the pletion of this thesis would not have been possible.

　　I also owe a special debt of gratitude to all the professors in Foreign Languages Institute, from whose devoted teaching and enlightening lectures I have benefited a lot and academically prepared for the thesis.

　　I should finally like to express my gratitude to my beloved parents who have always been.

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　　The accomplishment of this thesis has covered half a year,s experiment and another halfa years analysis. It can not be denied that whole process is quite tough. Despite all theproblems during research and limitations, the thesis finally comes into being. However, thiscan not be achieved without the help of many people.

　　First and foremost, I would like to give my sincere gratitude to my distinguished andrespectable supervisor, Prof. Qi Yuanfang, for his all-along supports during not only theresearch process, but the whole post-graduate year. He is the one who gives me inspiration ofthe thesis topic, enlightens me empirical method helps me conduct teaching experiment, andinstructs me analyzing approaches. I have to say that this thesis is born from his insightfulinstructions and warm encouragement.

　　Secondly, I also own my appreciation to Prof, Gongrong who gives me a lot ofinspiration, insightful advice and instructions.

　　And also, this thesis can not be accomplished without teachers of Foreign LanguagesSchool who impart knowledge to me and classmates who offer me help.

　　Last but not least, I would like to extend my thanks to the students participating in thisresearch for their patient corporation.

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　　The present work is the result of all joint efforts. So many people hada part in the making of this dissertation that it is hard to acknowledgethem all.

　　First of all, I would like to express my deep gratitude to Professor BaiJiehong, supervisor of my dissertation, for having continually stimulatedme with her methodological concerns and persistent guidan够 in bothrealms of studies and life during the lengthy period of my writing thework, for having helped me with so many practical problems, andparticularly for having stirred my interest in cognitive linguistics when Ibegan my work on graduate program under her supervision. wish tothank her sincerely for her tolerance and openness which nurtured myinterest in the present work. Now I consider it a great privilege to havegot the benefit of her professional guidance.

　　I would like to thank the College of Foreign Studies, Hunan NormalUniversity, for providing a stimulating academic environment and varioussupport which promote my growth here. Thanks to the professors at theEnglish Department for their share in shaping my view of the relationshipbetween language and cognition. I particularly appreciate my interactionwith Professor Huang Zhengding for his philosophical ideas,ProfessorLiao Guangrong for his open-mindedness and encouragement to my ideas,Professor Deng Yunhua for her inspiring comments to my questions, andProfessor Qin Yuxiang, for his nice grammar book which fanned myinterest in Cognitive Grammar and his discerning comments on my work.

　　Special thanks to Professor Jiang Hongxin, who broadened my visionthrough his course on classics. His eloquent talks made me feel as if Iwere a literary student, and I was inspired to read so much beyondlinguistics.

　　I am deeply grateful to the College of Foreign Studies as a whole foroffering me a warm home for my explorations. Without her support, Iwouldnt have got the opportunity to pursue my study at the ForeignLanguage Education and Research Center, Beijing Foreign StudiesUniversity; nor could I have won the scholarship from China ScholarshipCouncil, which enabled me to study at University of Oregon. My year ofapprenticeship at Beijing Foreign Studies University had a considerableinfluence on my view of language and language studies. Special thanks toProfessor Chen Guohua, who as the supervisor of my visiting programallowed me a chance to go into the world of Case Grammar, an inspiringworld I still love to stay and explore. Warm thanks also to ProfessorWang Kefei, who spared his time to discuss my topic and gave me hisprofessional advice during my stay at Beijing.