| Acknowledgements | 第1-4页 |
| ABSTRACT | 第4-5页 |
| 摘要 | 第5-8页 |
| Chapter One INTRODUCTION | 第8-12页 |
| ·Background of the study | 第8-9页 |
| ·Rationale of the Present Study | 第9页 |
| ·Objective of the Present Study | 第9-10页 |
| ·Overall Structure of the Study | 第10-12页 |
| Chapter Two LITERATURE REVIEW | 第12-34页 |
| ·Some Related Terms | 第12-18页 |
| ·Code | 第12-13页 |
| ·Codeswitching | 第13-18页 |
| ·Main Linguistic Approaches to the Study of Codeswitching | 第18-23页 |
| ·Sociolinguistic studies | 第19-21页 |
| ·Psycholinguistic studies | 第21-22页 |
| ·Conversational-analytic studies | 第22-23页 |
| ·Pragmatic studies | 第23页 |
| ·Researches on Classroom Codeswitching | 第23-27页 |
| ·Researches abroad | 第24-26页 |
| ·Researches at home | 第26-27页 |
| ·The Conceptual Framework | 第27-34页 |
| ·Verschueren’s Linguistic Adaptation | 第27-31页 |
| ·Language choices | 第28页 |
| ·Variability, negotiability and adaptability | 第28-29页 |
| ·Framework of adaptation theory | 第29-31页 |
| ·Yu Guodong’s Developmental Model | 第31-32页 |
| ·Framework of the Present Study | 第32-34页 |
| Chapter Three METHODOLOGY AND DATA COLLECTION | 第34-39页 |
| ·Research Questions | 第34-35页 |
| ·Subjects | 第35-36页 |
| ·Students | 第35页 |
| ·Teachers | 第35-36页 |
| ·Instruments | 第36-38页 |
| ·Design of questionnaire | 第36-37页 |
| ·Teachers’audio-recordings | 第37页 |
| ·Interview | 第37页 |
| ·Students’band 4 scores | 第37-38页 |
| ·Procedure and Data Collection | 第38-39页 |
| Chapter Four DISCUSSIONS Of The Results | 第39-46页 |
| ·Discussions of the Results of the Observation | 第39-42页 |
| ·Distribution of Chinese and English used by teachers in EFL classroom | 第39-40页 |
| ·Features of teachers codeswitching in EFL classroom | 第40-41页 |
| ·Distribution of Chinese/ English used by students in EFL classroom | 第41-42页 |
| ·Frequency Analysis of the Results of Students Questionnaires | 第42-44页 |
| ·Discussions of the Results of Teachers’Interview | 第44-46页 |
| Chapter FIVE PRAGMATIC ADAPTABILITY OF TEACHERS’ ENGLISH/ CHINESE CODESWITCHING | 第46-61页 |
| ·Motivations of Chinese/ English Codeswitching in EFL Classroom | 第46-59页 |
| ·Teachers’codeswitching as adaptation to the linguistic reality | 第46-48页 |
| ·Teachers’ codeswitching as adaptation to teachers’ role | 第48-53页 |
| ·Teachers’codeswitching as adaptation to psychological intentions | 第53-59页 |
| ·Summary | 第59-61页 |
| Chapter Six CONCLUSION | 第61-64页 |
| ·Summary of Findings | 第61-62页 |
| ·Limitations and Suggestions for Further Study | 第62-64页 |
| References | 第64-69页 |
| Appendix | 第69-72页 |
