| Acknowledgements | 第1-5页 |
| Abstract | 第5-7页 |
| 摘要 | 第7-12页 |
| Chapter 1 Introduction | 第12-17页 |
| ·Studies of Code-switching | 第12-13页 |
| ·Problem description | 第13页 |
| ·The role of L1 in L2 teaching and learning | 第13-14页 |
| ·Teachers' Code-switching | 第14-15页 |
| ·Purpose of the thesis | 第15页 |
| ·Statement of research questions | 第15-16页 |
| ·Organization of the thesis | 第16-17页 |
| Chapter 2 Literature review | 第17-31页 |
| ·The definition of Code-switching | 第17-18页 |
| ·Code-switching and relevant terms | 第18-21页 |
| ·Code-switching and Code-mixing | 第18-19页 |
| ·Main approaches to the analysis of Code-switching | 第19-21页 |
| ·Researches on Code-switching in China | 第21页 |
| ·Researches on Classroom Code-switching | 第21-22页 |
| ·Empirical studies on Code-switching in foreign language classroom | 第22-26页 |
| ·The analysis of current situation in Code-switching | 第26-31页 |
| ·Teaching Strategy in FL teaching and learning | 第26-28页 |
| ·Functions of teachers' Code-switching in classroom | 第28-29页 |
| ·Reasons for teachers' Code-switching | 第29-31页 |
| Chapter 3 A Survey on Teachers' Code-Switching between English and Chinese In classroom | 第31-57页 |
| ·Review of related studies | 第31页 |
| ·Hypotheses and Research Questions | 第31-32页 |
| ·Hypotheses and Survey Questions | 第31-32页 |
| ·Statement of research questions | 第32页 |
| ·Methods | 第32-35页 |
| ·Subjects and Design | 第32-33页 |
| ·Materials, Instruments and Measurements | 第33页 |
| ·Procedures | 第33-35页 |
| ·Results and Discussion | 第35-48页 |
| ·Frequency Analysis | 第35-48页 |
| ·The situation of teachers' Code-switching in the classroom | 第35-37页 |
| ·Different aspects of high school English teaching | 第37-40页 |
| ·The influence of teachers' Code-switching on students' English learning | 第40-45页 |
| ·Reasons for Teachers' Code-switching | 第45-48页 |
| ·Results of Teachers' Interview | 第48-49页 |
| ·Factors Governing the Teachers' Performance of Code-Switching | 第49-54页 |
| ·Discussion and possible pedagogical implications | 第54-57页 |
| Chapter 4 The Experiment about Using Code-Switching Effectively In EFL Classroom | 第57-71页 |
| ·The research question and hypothesis | 第57-61页 |
| ·The research question | 第57-59页 |
| ·Significance of the research | 第59-60页 |
| ·Feasibility of the research | 第60页 |
| ·Hypothesis | 第60-61页 |
| ·Research Design | 第61-65页 |
| ·Teaching strategies in the experiment | 第61页 |
| ·Objectives | 第61页 |
| ·Instructors | 第61-63页 |
| ·Subjects | 第63页 |
| ·Choice of material | 第63-64页 |
| ·Method | 第64-65页 |
| ·Stages of the experiment | 第64页 |
| ·Group Design | 第64-65页 |
| ·Procedure | 第65页 |
| ·Data collection and analysis | 第65-71页 |
| ·Experiment in Group 1 | 第65-67页 |
| ·Experiment in Group 2 | 第67-69页 |
| ·Experiment in Group 3 | 第69-71页 |
| Chapter 5 Conclusion and Implications | 第71-76页 |
| ·Conclusion | 第71-74页 |
| ·Discussion about teachers' use of L1 in cross lingual teaching strategy | 第71-72页 |
| ·Discussion about the ideal percentage of L1 in a L2 class | 第72-73页 |
| ·Principles for high school teachers' Code-switching between English and Chinese in the classroom | 第73-74页 |
| ·Limitations of the study | 第74-75页 |
| ·Implications | 第75-76页 |
| References | 第76-79页 |
| Appendix | 第79-81页 |
| 攻读学位期间的研究成果 | 第81页 |
