| ACKNOWLEDGEMENTS | 第1-6页 |
| ABSTRACT | 第6-8页 |
| 摘要 | 第8-10页 |
| CONTENTS | 第10-12页 |
| Chapter One INTRODUCTION | 第12-16页 |
| ·Research Background | 第12-13页 |
| ·Significance of the Study | 第13-14页 |
| ·Research Questions and Methodology | 第14-15页 |
| ·Organization of the Thesis | 第15-16页 |
| Chapter Two LITERATURE REVIEW | 第16-30页 |
| ·Code-Switching | 第16-19页 |
| ·Definitions of Terms | 第16-17页 |
| ·Types of Code-Switching | 第17-18页 |
| ·Code-switching, Borrowing and Nonce borrowing | 第18-19页 |
| ·Studies on Code-Switching | 第19-26页 |
| ·Studies on Code-Switching in China | 第19-22页 |
| ·The Sociolinguistic Approach | 第22-23页 |
| ·The Grammatical Approach | 第23-24页 |
| ·The Psychological Approach | 第24-25页 |
| ·The Conversational Approach | 第25-26页 |
| ·Studies on Fortress Besieged | 第26-30页 |
| Chapter Three THEORETICAL FRAMEWORK | 第30-38页 |
| ·Verschueren’s Adaptation Theory | 第30-33页 |
| ·Language Choice | 第30-31页 |
| ·Variability, Negotiability and Adaptability | 第31-32页 |
| ·Verschueren’s Theory of Context | 第32-33页 |
| ·Yu Guodong’s Linguistic Adaptation Model of Code-switching | 第33-38页 |
| ·Adaptation of Linguistic Reality | 第33-34页 |
| ·Adaptation of Social Conventions | 第34-35页 |
| ·Adaptation of Psychological Motivations | 第35-38页 |
| Chapter Four ANALYSIS OF CODE-SWITCHING IN FORTRESS BESIEGED FROM ADAPTAION THEORY | 第38-60页 |
| ·An Introduction of Fortress Besieged | 第38-39页 |
| ·Code-switching as Adaptation to the Linguistic Reality | 第39-44页 |
| ·Adaptation to the Linguistic Existence | 第39-42页 |
| ·Adaptation to the Linguistic Features | 第42-44页 |
| ·Code-switching as Adaptation to the Social Conventions | 第44-47页 |
| ·Code-switching as Adaptation to the Psychological Motivations | 第47-57页 |
| ·Code-switching as Mitigation Strategy | 第48-49页 |
| ·Code-switching as Humor-creating Strategy | 第49-50页 |
| ·Code-switching as Authenticity-keeping Strategy | 第50-52页 |
| ·Code-switching as Addressee Selection Strategy | 第52-53页 |
| ·Code-switching as Identity-establishing Strategy | 第53-55页 |
| ·Code-switching as Emphasis Strategy | 第55-57页 |
| ·Code-switching and Social and Cultural Background | 第57页 |
| ·Summary | 第57-60页 |
| Chapter Five CONLUSION | 第60-64页 |
| ·Major Findings | 第60-61页 |
| ·Limitations and Suggestions for Future Study | 第61-64页 |
| REFERENCES | 第64-68页 |
| PUBISHED PAPERS | 第68页 |
