| 英文摘要 | 第1-6页 |
| 摘要 | 第6-12页 |
| Chapter1 Introduction | 第12-16页 |
| ·Aims and Significance | 第12-13页 |
| ·Methodology and Data Collection | 第13-14页 |
| ·Organization of the Thesis | 第14-16页 |
| Chapter 2 Hedging in Academic Discourse | 第16-23页 |
| ·The Concepts of Hedging and Hedge | 第16-18页 |
| ·Features of Academic Research Articles | 第18-19页 |
| ·Significance of Hedging in Academic Research Articles | 第19-20页 |
| ·A Review of Hedging Research in Academic Discourse | 第20-22页 |
| ·Summary | 第22-23页 |
| Chapter 3 Towards a Dual-function Model of Hedging in Social Scientific Research Articles | 第23-41页 |
| ·A Review of Previous Hedging Models | 第23-32页 |
| ·Lakoff's Model of Hedges in Semantics | 第23-24页 |
| ·Prince et al's Model of Hedges in Spoken Academic Discourse | 第24-26页 |
| ·Myers' Model of Hedging in Written Academic Discourse | 第26-28页 |
| ·Hyland's Model of Hedging in Written Academic Discourse | 第28-32页 |
| ·A Dual-function Model of Hedging | 第32-39页 |
| ·A Functional Definition of Hedging | 第33页 |
| ·A Description of the Present Model | 第33-38页 |
| ·Epistemic Function of Hedging | 第35-36页 |
| ·Interpersonal Function of Hedging | 第36-38页 |
| ·A Taxonomy of Hedges in the Present Study | 第38-39页 |
| ·Summary | 第39-41页 |
| Chapter 4 Data Analysis | 第41-81页 |
| ·A Quantitative Analysis of Hedges | 第41-66页 |
| ·Frequencies of Hedges in the Corpus | 第41-62页 |
| ·Possible Reasons for Differences in Frequencies of Hedges | 第43-45页 |
| ·Description of Categories of Hedges | 第45-62页 |
| ·Distribution of Hedges in Four Sections of a Research Article | 第62-64页 |
| ·A Comparison of Hedges between Social Science and Natural Science | 第64-66页 |
| ·A Qualitative Analysis of Hedges | 第66-80页 |
| ·The Fuzzy-category Model | 第66-68页 |
| ·Epistemic Function of Hedges | 第68-72页 |
| ·Interpersonal Function of Hedges | 第72-80页 |
| ·Mitigating Face-threatening Acts | 第72-77页 |
| ·Involving Readers in the Ratification of Knowledge | 第77-80页 |
| ·Summary | 第80-81页 |
| Chapter 5 Conclusion | 第81-86页 |
| ·Major Findings | 第81-82页 |
| ·Major Contributions | 第82-83页 |
| ·Pedagogical Implications | 第83-85页 |
| ·Raising Students' Awareness to Hedging | 第83-84页 |
| ·Providing Chances for Students to Practice Hedges | 第84-85页 |
| ·Limitations of the Present Study and Suggestions for Further Study | 第85-86页 |
| Bibliography | 第86-90页 |
| Appendix | 第90-93页 |
| Acknowledgements | 第93页 |
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