| Acknowledgements | 第3-4页 |
| Abstract | 第4-5页 |
| 摘要 | 第6-10页 |
| Chapter One Introduction | 第10-14页 |
| 1.1 Research Background | 第10-11页 |
| 1.2 Purposes of This Research | 第11-12页 |
| 1.3 Significance of This Research | 第12-13页 |
| 1.4 Organization of The Thesis | 第13-14页 |
| Chapter Two Literature Review | 第14-34页 |
| 2.1 General Introduction to Code-switching | 第14-16页 |
| 2.1.1 The Definition of Code | 第14-15页 |
| 2.1.2 The Definition of Code-switching | 第15页 |
| 2.1.3 The Definition of Teachers’ Code-switching | 第15-16页 |
| 2.2 Classifications of Code-switching | 第16-19页 |
| 2.2.1 Intersentential-switching, Intrasentential-switching and Tag-switching | 第16-17页 |
| 2.2.2 Situational Code-switching and Metaphorical Code-switching | 第17-18页 |
| 2.2.3 Discourse-related Alternation and Participant-related Alternation | 第18页 |
| 2.2.4 Alteration, Insertion and Congruent Lexicalization | 第18-19页 |
| 2.3 Approaches to Code-switching Researches | 第19-26页 |
| 2.3.1 The Sociolinguistic Approach | 第19-20页 |
| 2.3.2 The Psycholinguistic Approach | 第20-21页 |
| 2.3.3 The Syntactical Approach | 第21-22页 |
| 2.3.4 The Conversational Analysis Approach | 第22-23页 |
| 2.3.5 The Pragmatic Approach | 第23-26页 |
| 2.4 Attitudes Towards Classroom Code-switching | 第26-29页 |
| 2.4.1 Support of Classroom Code-switching | 第26-27页 |
| 2.4.2 Oppositions to Classroom Code-switching | 第27-28页 |
| 2.4.3 Neutral Attitudes towards Classroom Code-switching | 第28-29页 |
| 2.5 The Review of Classroom-Code-switching | 第29-33页 |
| 2.5.1 Studies Abroad | 第29-31页 |
| 2.5.2 Studies at Home | 第31-33页 |
| 2.6 Summary | 第33-34页 |
| Chapter Three Methodology | 第34-46页 |
| 3.1 Research Questions | 第34页 |
| 3.2 Research Setting | 第34-35页 |
| 3.3 Research Subjects | 第35-39页 |
| 3.3.1 Subjects of Classroom Observation and Classroom Recordings | 第35-37页 |
| 3.3.2 Subjects of Questionnaire | 第37-38页 |
| 3.3.3 Subjects of Interview | 第38-39页 |
| 3.4 Research Instruments | 第39-42页 |
| 3.4.1 Classroom Observation | 第40页 |
| 3.4.2 Classroom Recordings | 第40页 |
| 3.4.3 Questionnaires | 第40-41页 |
| 3.4.4 Interview | 第41-42页 |
| 3.5 Procedure | 第42-46页 |
| 3.5.1 Preparation | 第42页 |
| 3.5.2 Procedure Process | 第42-43页 |
| 3.5.3 Data Analysis | 第43-46页 |
| 3.6 Summary | 第46页 |
| Chapter Four Results and Discussion | 第46-72页 |
| 4.1 The Frequency of Code-switching in English Classes | 第46-52页 |
| 4.1.1 The Frequency of Teachers’ Code-switching in Different Grades | 第46-48页 |
| 4.1.2 The Frequency of Code-switching in Different Lesson Types | 第48-50页 |
| 4.1.3 The Frequency of Code-switching in Different Types | 第50-52页 |
| 4.2 Students’ and Teachers’ Attitudes Towards Code-switching in English Classes | 第52-62页 |
| 4.2.1 Students’ and Teachers’ General Attitudes Towards Code-switching in EnglishClasses | 第52-54页 |
| 4.2.2 Students’ and Teachers’ Attitudes Towards the Frequency of ClassroomCode-switching | 第54-55页 |
| 4.2.3 Students’ and Teachers’ Attitudes Towards the Amount of ClassroomCode-switching | 第55-58页 |
| 4.2.4 Students’ and teachers’ attitudes towards the helpfulness of classroomcode-switching | 第58-60页 |
| 4.2.5 Students’ Feedback and Expectations for Code-switching in Class | 第60-61页 |
| 4.2.6 Summary | 第61-62页 |
| 4.3 Different Functions of Classroom Code-switching | 第62-69页 |
| 4.3.1 Translation | 第62-64页 |
| 4.3.2 Meta-linguistic Uses | 第64-66页 |
| 4.3.3 Communicative Uses | 第66-69页 |
| 4.4 The Influencing Factors of Teachers’ Code-switching | 第69-72页 |
| 4.4.1 English Proficiency of Students | 第70页 |
| 4.4.2 Teachers’ Attitudes towards Code-switching | 第70-71页 |
| 4.4.3 Limited Teaching Time | 第71页 |
| 4.4.4 Other Factors | 第71-72页 |
| Chapter Five Conclusion | 第72-76页 |
| 5.1 Summary of the Major Findings | 第72-73页 |
| 5.2 Pedagogic Implications | 第73-75页 |
| 5.3 Limitations of the Study and Suggestions for Future Study | 第75-76页 |
| Bibliography | 第76-80页 |
| Appendices | 第80-83页 |
| 攻读硕士期间发表论文 | 第83页 |
