| Acknowledgements | 第1-5页 |
| 摘要 | 第5-7页 |
| Abstract | 第7-14页 |
| Chapter One Introduction | 第14-18页 |
| ·Background of the Research | 第14-15页 |
| ·Significance and Purpose of the Research | 第15-16页 |
| ·Layout of the Thesis | 第16-18页 |
| Chapter Two Literature Review | 第18-28页 |
| ·Studies of Teacher Talk | 第18-20页 |
| ·Definition of Teacher Talk | 第18-19页 |
| ·Features of Teacher Talk | 第19-20页 |
| ·Studies on Hedges | 第20-25页 |
| ·Definitions of Hedge | 第20-22页 |
| ·Classifications of Hedges | 第22-25页 |
| ·Researches on Hedges Abroad and at Home | 第25-28页 |
| ·Researches on Hedges Abroad | 第25-26页 |
| ·Researches on Hedges at Home | 第26-28页 |
| Chapter Three Theoretical Framework | 第28-36页 |
| ·Cooperative Principle | 第28-30页 |
| ·Conversational Implicature | 第30-33页 |
| ·Connotations of Conversational Implicature | 第30-31页 |
| ·Features of Conversational Implicature | 第31-33页 |
| ·The Theory of Politeness | 第33-36页 |
| ·Leech’s Politeness Principle | 第33-34页 |
| ·Brown & Levinson’s Face Theory | 第34-36页 |
| Chapter Four Research Methodology | 第36-40页 |
| ·Research Questions | 第36页 |
| ·Subjects of the Research | 第36-37页 |
| ·Instruments of the Research | 第37页 |
| ·Data Collection | 第37-40页 |
| ·Teaching Videos | 第38页 |
| ·Semi-structured Interviews | 第38-40页 |
| Chapter Five Results and Discussion | 第40-62页 |
| ·Overall Use of Hedges in Teacher Talk | 第40-42页 |
| ·Analysis and Findings From Teaching Videos | 第42-47页 |
| ·Adaptors in Teacher Talk | 第42-43页 |
| ·Rounders in Teacher Talk | 第43-44页 |
| ·Plausible Shields in Teacher Talk | 第44-46页 |
| ·Attribution Shields in Teacher Talk | 第46-47页 |
| ·Analysis and Findings from Interviews | 第47-49页 |
| ·Application of Hedges in Teacher Talk at Different Teaching Steps | 第49-55页 |
| ·Expressing Ideas | 第49-51页 |
| ·Making Examples | 第51-52页 |
| ·Giving Instructions | 第52-53页 |
| ·Providing Feedback | 第53-55页 |
| ·Pragmatic Functions of Hedges in Teacher Talk | 第55-59页 |
| ·To Enhance Information Precision | 第55-56页 |
| ·To Show Politeness | 第56-57页 |
| ·To Be a Remedy for Self-protection | 第57-59页 |
| ·Pedagogical Implications | 第59-62页 |
| ·Raise the Awareness of the Use of Hedges | 第59-60页 |
| ·Utilize Hedges Flexibly | 第60-61页 |
| ·Attach Importance to Culture | 第61-62页 |
| Chapter Six Conclusion | 第62-65页 |
| ·Major Findings | 第62-63页 |
| ·Limitations of the Study | 第63-64页 |
| ·Suggestions for the Future Study | 第64-65页 |
| Bibliography | 第65-69页 |
| Published Papers | 第69-70页 |
| Appendix I | 第70-71页 |
| Appendix II | 第71-78页 |
