| Acknowledgements | 第1-5页 |
| Abstract | 第5-8页 |
| 内容摘要 | 第8-12页 |
| Chapter One Introduction | 第12-15页 |
| ·The Background of the Present Study | 第12-13页 |
| ·The Rationale for the Study | 第13页 |
| ·Organization of the Study | 第13-15页 |
| Chapter Two Prior Researches on Codeswitching | 第15-32页 |
| ·Definitions and Types of Codeswitching | 第15-18页 |
| ·Codeswitching, Borrowing and Diglossia | 第18-19页 |
| ·Approaches to the Analysis of Codeswitching | 第19-24页 |
| ·The Formal Approach | 第20-21页 |
| ·The Functional Approach | 第21-24页 |
| ·Prior Studies on Chinese/English Codeswitching | 第24-29页 |
| ·Chinese/English Codeswitching Prevalence | 第24-25页 |
| ·Studies on Chinese/English Codeswitching | 第25-29页 |
| ·Problems in the Existing Studies | 第29-30页 |
| ·Data and Methodology | 第30-32页 |
| Chapter Three Cognitive View on Chinese/English Codeswitching | 第32-35页 |
| ·General Remarks of Cognitive Linguistics | 第32-33页 |
| ·Cognitive Factors in Codeswitching Theories | 第33-34页 |
| ·Feasibility of Chinese/English Codeswitching from Cognitive View | 第34-35页 |
| Chapter Four Motivation for Chinese/English Codeswitching | 第35-44页 |
| ·Constructing Motivation for Codeswitching | 第35-37页 |
| ·The Tenets of Figure/Ground Theory | 第37-39页 |
| ·Types of Chinese/English Codeswitching and Figure/Ground Theory | 第39-42页 |
| ·Prominence View of Chinese/English Codeswitching | 第42-44页 |
| Chapter Five Prototypes of Constraints on Chinese/English Codeswitching | 第44-63页 |
| ·Syntactic Constraints on Codeswitching | 第44-45页 |
| ·Prototype Theory and Codeswitching | 第45-48页 |
| ·Prototypes of Chinese/English Codeswitching in Different Genres | 第48-56页 |
| ·Prototypes of Chinese/English Codeswitching in Written Forms | 第49-53页 |
| ·Prototypes of Chinese/English Codeswitching in Literature Works | 第49-51页 |
| ·Prototypes of Chinese/English Codeswitching in Newspapers | 第51-53页 |
| ·Prototypes of Chinese/English Codeswitching in Spoken Forms | 第53-56页 |
| ·Prototypes of Chinese/English Codeswitching in Daily Conversations | 第53-55页 |
| ·Prototypes of Chinese/English Codeswitching in Net-speak | 第55-56页 |
| ·Prototypes of Morphosyntactic Constraints on Chinese/English Codeswitching | 第56-62页 |
| ·Nouns and Noun Phrases | 第57-59页 |
| ·Adjectives and Adjective Phrases | 第59-60页 |
| ·Verbs and Verb Phrases | 第60-61页 |
| ·Embedded Language Islands | 第61-62页 |
| ·Prototipicality of Chinese/English Codeswitching | 第62-63页 |
| Chapter Six Conclusion | 第63-66页 |
| ·Findings of the study | 第63页 |
| ·The Limitations of This Study | 第63-64页 |
| ·Suggestions for Further Study | 第64-66页 |
| References | 第66-71页 |
