| Acknowledgements | 第1-7页 |
| 中文摘要 | 第7-8页 |
| Abstract | 第8-10页 |
| Chapter 1 Introduction | 第10-13页 |
| ·Research Source | 第10-11页 |
| ·Theoretical Basis of the Research | 第11页 |
| ·Research Questions | 第11页 |
| ·Organization of the Thesis | 第11-13页 |
| Chapter 2 Literature Review of Code-Switching | 第13-20页 |
| ·Definitions of CS | 第13-14页 |
| ·Categories of CS | 第14-16页 |
| ·Approaches to CS Research | 第16-20页 |
| ·The Sociolinguistic Approach | 第16-17页 |
| ·The Grammatical Approach | 第17页 |
| ·The Psycholinguistic Approach | 第17-18页 |
| ·The Conversational Analysis Approach | 第18-19页 |
| ·The Pragmatic Approach | 第19-20页 |
| Chapter 3 Linguistic Adaptation Theory and Adaptation Model for CS study | 第20-26页 |
| ·Linguistic Adaptation Theory | 第20-23页 |
| ·Variability, Negotiability and Adaptability | 第20-21页 |
| ·Sketch of Adaptation Theory | 第21-23页 |
| ·Contextual Correlates of Adaptability | 第21-22页 |
| ·Structural Objects of Adaptability | 第22页 |
| ·Dynamics of Adaptability | 第22页 |
| ·Salience of Adaptation Processes | 第22-23页 |
| ·Adaptation Model for CS Study | 第23-24页 |
| ·CS as Realization of Adaptation | 第24-26页 |
| ·Adaptation to Linguistic Reality | 第24-25页 |
| ·Adaptation to Social Conventions | 第25页 |
| ·Adaptation to Psychological Motivations | 第25-26页 |
| Chapter 4 Code-Switching in Online Discourse | 第26-37页 |
| ·Brief Account of Online Discourse | 第26-27页 |
| ·Definition | 第26页 |
| ·Features | 第26-27页 |
| ·Major Areas of Research | 第27页 |
| ·Online Activities of Chinese Netizens | 第27-28页 |
| ·Two Methods of Data Collection | 第28-36页 |
| ·Data Collected from Different Modes of Online Discourse | 第28-31页 |
| ·Data from Online Chat | 第28-29页 |
| ·Data from Discussion Forum/BBS | 第29-30页 |
| ·Data from E-mail | 第30页 |
| ·Data from Blog/Weblog | 第30-31页 |
| ·Data from Net Literature | 第31页 |
| ·Data Collected from Questionnaire | 第31-36页 |
| ·Methods of Data Analysis | 第36-37页 |
| Chapter 5 Results and Discussions | 第37-52页 |
| ·Review of Research Questions | 第37页 |
| ·What are Different Forms of Chinese-English CS in Online Discourse | 第37-40页 |
| ·CS in Terms of Structural Complexity | 第37页 |
| ·CS in Terms of Linguistic Units | 第37-40页 |
| ·Letters | 第38页 |
| ·Numbers Mixed with Letters | 第38-39页 |
| ·Suffixes | 第39页 |
| ·Words | 第39页 |
| ·Phrases | 第39页 |
| ·Clauses/Sentences | 第39-40页 |
| ·What are the Characteristics of Chinese-English CS in Online Discourse | 第40页 |
| ·Why do Netizens Switch between Chinese and English | 第40-52页 |
| ·The Adaptation to Linguistic Reality | 第40-44页 |
| ·Adaptation to the Linguistic Existence of Chinese and English | 第40-43页 |
| ·Adaptation to Semantic Features of Chinese and English | 第43-44页 |
| ·The Adaptation to Social Conventions | 第44-46页 |
| ·The Adaptation to Psychological Motivations | 第46-50页 |
| ·Convenience Seeking Strategy | 第47-48页 |
| ·Emphasizing Strategy | 第48页 |
| ·Modern Flavor Gaining Strategy | 第48-49页 |
| ·Humor/Fun Creating Strategy | 第49页 |
| ·Special Taste Showing Strategy | 第49-50页 |
| ·Unconscious CS-- an Exception of the Mentioned Motivations or not? | 第50-52页 |
| Chapter 6 Conclusion | 第52-54页 |
| ·Findings of the Present Study | 第52-53页 |
| ·Limitations of the Present Study | 第53页 |
| ·Suggestions for Future Study | 第53-54页 |
| Bibliography | 第54-57页 |
| Appendix Chinese Translation of the Questionnaire | 第57-59页 |
| Publications during the Postgraduate Program | 第59-60页 |
