| Abstract | 第1-7页 |
| 摘要 | 第7-9页 |
| Contents | 第9-12页 |
| Chapter I. Introduction | 第12-18页 |
| ·Background of the Research | 第12-14页 |
| ·Purpose of the Paper | 第14-15页 |
| ·Significance of the Study | 第15-16页 |
| ·Organization of the Thesis | 第16-18页 |
| Chapter Ⅱ. Literature Review | 第18-34页 |
| ·General Introduction to Code-switching | 第18-22页 |
| ·The Definition of Code, Code-switching and Teachers’Code-switching | 第18-21页 |
| ·Categories of Code-switching | 第21-22页 |
| ·Approaches to the study of Code-switching | 第22-28页 |
| ·Sociolinguistic Approach | 第22-23页 |
| ·Grammatical Approach | 第23-25页 |
| ·Psycholinguistic Approach | 第25-26页 |
| ·Conversational Analysis (CA) Approach | 第26-27页 |
| ·Pragmatic Analysis Approach | 第27-28页 |
| ·Review of Code-switching Studies in Pedagogical Field | 第28-34页 |
| ·Studies Abroad | 第28-31页 |
| ·Studies in China | 第31-34页 |
| Chapter Ⅲ. Theoretical Frameworks | 第34-45页 |
| ·Adaptation Theory of Jef Verschueren | 第34-37页 |
| ·Three Properties of Language | 第34-35页 |
| ·Four Angles of Adaptation | 第35-37页 |
| ·Adaptation Model on Code-switching of Yu Guodong | 第37-40页 |
| ·Adaptation to Linguistic Reality | 第38页 |
| ·Adaptation to Social Conventions | 第38-39页 |
| ·Adaptation to Psychological Motivation | 第39-40页 |
| ·Face Theory of Brown and Levinson | 第40-45页 |
| ·Face Threatening Acts Theory | 第41-42页 |
| ·Politeness Strategies | 第42-45页 |
| Chapter Ⅳ. Research Methodology | 第45-53页 |
| ·Research Questions | 第45-46页 |
| ·Research Subjects | 第46-48页 |
| ·Research Instruments | 第48-51页 |
| ·Classroom Observation | 第49页 |
| ·Teachers’ Questionnaire | 第49-50页 |
| ·Teachers’ Interview | 第50-51页 |
| ·Data Collection | 第51-53页 |
| Chapter Ⅴ. Results and Discussion | 第53-79页 |
| ·Data Analysis | 第54-58页 |
| ·Teachers’ Code-switching as Adaptation to Linguistic Reality | 第58-62页 |
| ·Teachers’ Code-switching as Adaptation to Social Conventions | 第62-65页 |
| ·Teachers’ Code-switching as Adaptation to Psychological Motivation | 第65-73页 |
| ·Teachers’ Code-switching as a Strategy for Emphasis | 第65-67页 |
| ·Teachers’ Code-switching as a Strategy for Understanding Facilitating | 第67-68页 |
| ·Teachers’ Code-switching as a Strategy for Face-keeping | 第68-70页 |
| ·Teachers’ Code-switching as a Strategy for Humor-creating | 第70-72页 |
| ·Teachers’ Code-switching as a Strategy for Class Managing | 第72-73页 |
| ·Teachers’ Code-switching as Adaptation to Teachers’ Roles | 第73-79页 |
| ·As Adaptation to Teachers’ Macro-role | 第74-76页 |
| ·As Adaptation to Teachers’ Micro-role | 第76-79页 |
| Chapter Ⅵ. Conclusions | 第79-84页 |
| ·Major Findings | 第79-80页 |
| ·Implications of the Study | 第80-81页 |
| ·Limitations of the Study | 第81-82页 |
| ·Suggestions for Further Study | 第82-84页 |
| Bibliography | 第84-88页 |
| AppendixⅠ | 第88-90页 |
| AppendixⅡ | 第90-91页 |
| AppendixⅢ | 第91-95页 |
| Acknowledgement | 第95页 |
