| Acknowledgements | 第1-7页 |
| 中文摘要 | 第7-8页 |
| Abstract | 第8-12页 |
| Chapter One Introduction | 第12-16页 |
| ·Origin of Research | 第12-13页 |
| ·The Rationale of the Present Study | 第13页 |
| ·Objectives of the Thesis | 第13-14页 |
| ·Structure of the Thesis | 第14-16页 |
| Chapter Two Literature Review | 第16-32页 |
| ·Code-switching | 第16-22页 |
| ·Definitions of Code-switching | 第16-17页 |
| ·Types of Code-switching | 第17-19页 |
| ·Approaches to the Study of Code-switching | 第19-22页 |
| ·Linguistic Adaptation Theory | 第22-27页 |
| ·Language Choices | 第22-23页 |
| ·Variability, Negotiability and Adaptability | 第23-24页 |
| ·Four Angles of Investigation | 第24-27页 |
| ·The Adaptation Model for Code-switching Study | 第27-32页 |
| ·Code-switching as Linguistic Choice | 第27-28页 |
| ·Code-switching as Realization of Adaptation | 第28-29页 |
| ·The Adaptation Model for Code-switching Study | 第29-32页 |
| Chapter Three Chinese-English Code-switching in Online Discourse | 第32-44页 |
| ·A Brief Introduction to Online Discourse | 第32-33页 |
| ·Definition | 第32页 |
| ·Features | 第32-33页 |
| ·Research Areas of Online Discourse | 第33页 |
| ·Chinese-English Code-switching Phenomenon in Online Discourse | 第33页 |
| ·Data Collection | 第33-44页 |
| ·Data from Different Areas of Online Discourse | 第34-37页 |
| ·Data from the Questionnaire | 第37-44页 |
| Chapter Four Data Analysis and Results | 第44-73页 |
| ·Reasons of Chinese-English Code-switching in Online Discourse | 第44-68页 |
| ·Adaptation to the Linguistic Reality | 第44-56页 |
| ·Adaptation to the Social Conventions | 第56-60页 |
| ·Adaptation to the Psychological Motivations | 第60-68页 |
| ·Linguistic Features of Chinese-English Code-switching in Online Discourse | 第68-73页 |
| ·Insertion of English Words or English suffix | 第68-69页 |
| ·Alternation between Chinese and English | 第69-73页 |
| Chapter Five Conclusion | 第73-76页 |
| ·Findings of the Thesis | 第73-74页 |
| ·Limitations and Suggestions for Further Study | 第74-76页 |
| Bibliography | 第76-79页 |
| Appendix | 第79-80页 |
