| 摘要 | 第5-6页 |
| Abstract | 第6-7页 |
| Chapter I Introduction | 第10-14页 |
| 1.1 Research Background | 第10-11页 |
| 1.2 Significance of the Study | 第11-12页 |
| 1.3 Research Questions | 第12页 |
| 1.4 Organization of the Thesis | 第12-14页 |
| Chapter II Literature Review | 第14-22页 |
| 2.1 Definitions of Code-switching | 第14-15页 |
| 2.2 Code-switching and Code-mixing | 第15-16页 |
| 2.3 Classifications of Code-switching | 第16-17页 |
| 2.4 Approaches to the Analysis of Code-switching | 第17-20页 |
| 2.5 Empirical Studies on Classroom Code-switching | 第20-21页 |
| 2.6 Summary of the Chapter | 第21-22页 |
| Chapter III Theoretical Framework | 第22-31页 |
| 3.1 Verschueren’s Adaptation Theory | 第22-25页 |
| 3.1.1 Variability, Negotiability and Adaptability | 第23页 |
| 3.1.2 Four Angles of Investigation | 第23-25页 |
| 3.2 Yu Guodong’s Adaptation Model | 第25-30页 |
| 3.2.1 Adaptation to Linguistic Reality | 第26-27页 |
| 3.2.2 Adaptation to Social Conventions | 第27-29页 |
| 3.2.3 Adaptation to Psychological Motivations | 第29-30页 |
| 3.3 Summary of the Chapter | 第30-31页 |
| Chapter IV Research Methodology | 第31-35页 |
| 4.1 Subjects of the Study and Research Methodology | 第31-32页 |
| 4.2 Instruments | 第32-35页 |
| 4.2.1 Recording | 第32-33页 |
| 4.2.2 Questionnaires | 第33-34页 |
| 4.2.3 Teacher Interview | 第34-35页 |
| Chapter V Data Analysis and Results | 第35-64页 |
| 5.1 Results of the Questionnaires | 第35-41页 |
| 5.1.1 Frequency of Teachers’ Code-switching in Class | 第38-39页 |
| 5.1.2 Attitudes toward Teachers’ Code-switching in Class | 第39-40页 |
| 5.1.3 Factors Triggering Teachers’ Code-switching in Classes | 第40-41页 |
| 5.1.4 Influences of Teachers’ code-switching in Class | 第41页 |
| 5.2 Findings of Classroom Recordings | 第41-43页 |
| 5.3 Results of Teachers’ Interview | 第43-44页 |
| 5.4 Pragmatic Functions of Code-switching in Classrooms | 第44-55页 |
| 5.4.1 Code-switching as Gap-filling Function | 第44-46页 |
| 5.4.2 Code-switching as Class-management Function | 第46-47页 |
| 5.4.3 Code-switching as Anxiety-avoidance Function | 第47-48页 |
| 5.4.4 Code-switching as Efficiency-improving Function | 第48-49页 |
| 5.4.5 Code-switching as Authenticity-keeping Function | 第49-50页 |
| 5.4.6 Code-switching as Understanding-facilitating Function | 第50-51页 |
| 5.4.7 Code-switching as Generalization Function | 第51-52页 |
| 5.4.8 Code-switching as Emphasis Giving Function | 第52-53页 |
| 5.4.9 Code-switching as Humor-creating Function | 第53-54页 |
| 5.4.10 Code-switching as Intimacy-keeping Function | 第54-55页 |
| 5.4.11 Code-switching as Face-saving Function | 第55页 |
| 5.5 The Influences of Code-switching on the Teaching Process | 第55-61页 |
| 5.5.1 Positive Influences of Code-switching on Teaching Process | 第55-59页 |
| 5.5.2 Negative Influences of Code-switching on Teaching Process | 第59-61页 |
| 5.6 Code-switching on Different Aspects of Students’ Study | 第61-63页 |
| 5.7 Summary | 第63-64页 |
| Chapter VI Conclusion | 第64-69页 |
| 6.1 Main Findings | 第64-66页 |
| 6.2 Implications | 第66-67页 |
| 6.3 Limitations | 第67页 |
| 6.4 Suggestions for Further Study | 第67-69页 |
| References | 第69-71页 |
| Appendix Selected Recordings | 第71-74页 |
| Acknowledgements | 第74-75页 |
