| 内容提要 | 第1-5页 |
| SYNOPSIS | 第5-9页 |
| ChapterⅠ Introduction | 第9-14页 |
| ·Objectives of the present study | 第10-11页 |
| ·The significance of writing this paper and its structure | 第11-14页 |
| ChapterⅡ Pragmatic approach to the analysis of codeswitching | 第14-35页 |
| ·Adaptation theory of codeswitching | 第18-21页 |
| ·Three notions of codeswitching | 第21-24页 |
| ·Negotiability | 第21-22页 |
| ·Variability | 第22-24页 |
| ·Adaptability | 第24页 |
| ·Adaptation of codeswitching | 第24-31页 |
| ·Adaptation to linguistic reality | 第27-28页 |
| ·Adaptation to social conventions | 第28-29页 |
| ·Adaptation to psychological motivations | 第29-31页 |
| ·Studies of classroom codeswitching | 第31-35页 |
| ·Distribution of L1 and L2 | 第31-32页 |
| ·Discourse function of codeswitching | 第32页 |
| ·Sequential flow of classroom discourse | 第32-35页 |
| Chapter Ⅲ Investigation into codeswitching in College English instruction | 第35-41页 |
| ·Research questions | 第36页 |
| ·Subjects | 第36-38页 |
| ·Instruments | 第38-41页 |
| Chapter Ⅳ Result and analysis | 第41-69页 |
| ·Variation of codeswitching | 第41-50页 |
| ·Variation manifested in linguistic units | 第41-43页 |
| ·Variation manifested in syntactic categorization | 第43-50页 |
| ·Adaptation of teacher’s codeswitching in classroom | 第50-65页 |
| ·Codeswitching as adaptation to linguistic reality | 第50-53页 |
| ·Codeswitching as adaptation to teachers’ roles | 第53-57页 |
| ·Codeswitching as adaptation to psychological motivations | 第57-65页 |
| ·Analysis on student’s attitudes to teachers’codeswitching | 第65-69页 |
| Chapter Ⅴ Conclusion | 第69-76页 |
| ·Necessity of codeswitching in classroom | 第69-70页 |
| ·Patterns of codeswitching in classroom | 第70-71页 |
| ·Contributions of codeswitching in College English teaching | 第71-73页 |
| ·Possible pedagogical implications | 第73-76页 |
| Bibliography | 第76-83页 |
| Appendix | 第83-86页 |
| 论文摘要 | 第86-89页 |
| Abstract | 第89-93页 |
| Acknowledgement | 第93页 |
