| Acknowledgements | 第4-7页 |
| List of Abbreviations | 第7-8页 |
| Abstract | 第8-10页 |
| 内容摘要 | 第11-13页 |
| Chapter One Introduction | 第13-20页 |
| 1.1 Research Background | 第13-16页 |
| 1.2 Purposes and Significance of the Research | 第16-18页 |
| 1.3 Organization of the Present Thesis | 第18-20页 |
| Chapter Two Literature Review | 第20-46页 |
| 2.1 Theoretical Bases | 第20-38页 |
| 2.1.1 Theories about Classroom Discourse | 第20-23页 |
| 2.1.1.1 Features and Functions of Teachers' Classroom Discourse | 第21-22页 |
| 2.1.1.2 Features and Functions of Students' Classroom Discourse | 第22-23页 |
| 2.1.2 Theories about Socio-constructivism | 第23-38页 |
| 2.1.2.1 Teaching Perspectives from Socio-constructivism | 第24-29页 |
| 2.1.2.2 Theories of Zone of Proximal Development | 第29-31页 |
| 2.1.2.3 Definition of Scaffolding in Classroom Context | 第31-38页 |
| 2.2 Definitions of Discourse Analysis and Classroom Discourse | 第38-40页 |
| 2.2.1 Definitions of Discourse Analysis | 第38-39页 |
| 2.2.2 Definitions of Classroom Discourse | 第39-40页 |
| 2.3 Previous Researches on Scaffolding in Classroom Discourse | 第40-46页 |
| 2.3.1 Previous Researches on Scaffolding and Classroom Discourse Abroad | 第40-42页 |
| 2.3.2 Previous Researches on Scaffolding and Classroom Discourse at Home | 第42-43页 |
| 2.3.3 Previous Researches on Scaffolding in Classroom Discourse | 第43-45页 |
| 2.3.4 Limitations of Previous Researches and Value of This Thesis | 第45-46页 |
| Chapter Three Research Method | 第46-60页 |
| 3.1 Research Questions | 第46-47页 |
| 3.2 Subjects | 第47-48页 |
| 3.3 Instruments | 第48-50页 |
| 3.3.1 Questionnaire for Students | 第48-49页 |
| 3.3.2 Interview with Teachers | 第49页 |
| 3.3.3 Classroom Observation and Video Taped | 第49-50页 |
| 3.4 Data Collection and Analysis Procedure | 第50-60页 |
| 3.4.1 Data Collection | 第50-51页 |
| 3.4.2 Date Analysis | 第51-60页 |
| 3.4.2.1 Data Analysis for Research Question One | 第52-55页 |
| 3.4.2.2 Data Analysis for Research Question Two | 第55-59页 |
| 3.4.2.3 Data Analysis for Research Question Three | 第59-60页 |
| Chapter Four Results and Discussion | 第60-70页 |
| 4.1 Results and Discussion for Research Question One | 第60-65页 |
| 4.1.1 Results for Research Question One | 第60-62页 |
| 4.1.2 Discussion for Research Question One | 第62-65页 |
| 4.2 Results and Discussion for Research Question Two | 第65-67页 |
| 4.2.1 Results for Research Question Two | 第65页 |
| 4.2.2 Discussion for Research Question Two | 第65-67页 |
| 4.3 Results and Discussion for Research Question Three | 第67-70页 |
| 4.3.1 Results for Research Question Three | 第67页 |
| 4.3.2 Discussion for Research Question Three | 第67-70页 |
| Chapter Five Conclusion | 第70-76页 |
| 5.1 Major Findings | 第70-71页 |
| 5.2 Suggestions | 第71-74页 |
| 5.2.1 Suggestions for Teachers'Instruction | 第71-73页 |
| 5.2.2 Suggestions for Students'Learning | 第73-74页 |
| 5.3 Limitations and Prospects for Future Study | 第74-76页 |
| References | 第76-81页 |
| Appendix Ⅰ Interview Questions for Teachers | 第81-82页 |
| Appendix Ⅱ Extracts of Interview for Teachers | 第82-85页 |
| Appendix Ⅲ Questionnaire for Students | 第85-88页 |
| Appendix Ⅳ Scaffolding in Teaching Episodes | 第88-96页 |
