| Descriptive Chinese Abstract | 第1-6页 |
| English Abstract | 第6-11页 |
| Introduction | 第11-14页 |
| ·Thesis Topic | 第11页 |
| ·Objectives of the Present Study | 第11-12页 |
| ·Research Methodology | 第12-13页 |
| ·Thesis Organization | 第13-14页 |
| CHAPTER 1: Previous Researches on Code-switching Motivations | 第14-29页 |
| ·Definitions of Some Key Terms | 第14-16页 |
| ·Code and Code-switching | 第14-15页 |
| ·Motivation and Code-switching Motivation | 第15-16页 |
| ·Types of Code-switching | 第16-17页 |
| ·Approaches to the Research of Code-switching Motivations | 第17-24页 |
| ·Structural Approach to the Research of Code-switching | 第17-18页 |
| ·Sociolinguistic Approach to the Research of Code-switching | 第18-24页 |
| ·Overview of Code-switching in Classroom Teaching | 第24-27页 |
| ·Evaluation of the Previous Researches on Code-switching Motivations | 第27-29页 |
| CHAPTER 2: Motivations of Speakers’Code-switching under the Markedness Model | 第29-34页 |
| ·The Markedness Model as a Rational Actor Model | 第29-31页 |
| ·Speakers’Code-switching out of Rationality | 第31-32页 |
| ·The Unmarked Choice of Code-switching as a Vehicle for a Given RO Set | 第32-33页 |
| ·The Marked Choice of Code-switching as an Intervention to Negotiate New Norms | 第33-34页 |
| CHAPTER 3: A Qualitative Approach to Investigate Teachers’Motivations for English/Chinese Code-switching in EFL Teaching | 第34-52页 |
| ·An Observation to Investigate the Linguistic Features of Teachers’Code-switching | 第34-37页 |
| ·Research Subjects and Data Collection | 第35-36页 |
| ·Data Analysis | 第36-37页 |
| ·An Interview to Survey Teachers’Motivations for Code-switching | 第37-38页 |
| ·Research Subjects and Data Collection | 第37-38页 |
| ·Data Analysis | 第38页 |
| ·Results and Discussion | 第38-51页 |
| ·Features of Teachers’Code-switching in EFL teaching | 第39-41页 |
| ·Teachers’Code-switching as an Unmarked Choice | 第41-42页 |
| ·Motivations for Teachers’Code-switching in EFL teaching | 第42-51页 |
| ·Major Findings from the Qualitative Approach | 第51-52页 |
| CHAPTER 4: A Quantitative Approach to Survey Students’Evaluations to Teachers’Code-switching | 第52-57页 |
| ·Research Subjects | 第52页 |
| ·Questionnaire Design and Data Collection | 第52-53页 |
| ·Data Analysis | 第53页 |
| ·Results and Discussion: Students’Evaluations on Teachers’Code-switching in EFL Teaching | 第53-56页 |
| ·Major Findings from the Quantitative Approach | 第56-57页 |
| CHAPTER 5: Pedagogical Implications | 第57-61页 |
| ·Recognizing the Importance of Code-switching in EFL Teaching | 第57-58页 |
| ·Using Code-switching in a Proper Way | 第58-61页 |
| Conclusion | 第61-63页 |
| Notes | 第63-64页 |
| References | 第64-69页 |
| Acknowledgements | 第69-70页 |
| Appendix A: Publications during the Program | 第70-71页 |
| Appendix B: Interview Outline | 第71-72页 |
| Appendix C: Questionnaire | 第72-75页 |
| Appendix D: Selected Examples of English/Chinese Code-switching | 第75-78页 |
| Appendix E: Informative Chinese Abstract | 第78-81页 |
