| 摘要 | 第5-6页 |
| ABSTRACT | 第6页 |
| List of Abbreviations | 第7-11页 |
| Chapter 1 Introduction | 第11-14页 |
| 1.1 Background of the Study | 第11-12页 |
| 1.2 Significance of the Study | 第12页 |
| 1.3 Research Questions of the Study | 第12-13页 |
| 1.4 Layout of the Study | 第13-14页 |
| Chapter 2 Literature Review | 第14-32页 |
| 2.1 Fuzziness | 第14-17页 |
| 2.2 Definitions of Hedges | 第17-19页 |
| 2.3 Classifications of Hedges | 第19-27页 |
| 2.3.1 Grammatical and Semantic Classifications of Hedges | 第19-21页 |
| 2.3.2 Pragmatic Classifications of Hedges | 第21-27页 |
| 2.4 A Review of Studies on Hedges | 第27-32页 |
| 2.4.1 Semantic Studies of Hedges | 第28页 |
| 2.4.2 Studies of Hedges Within Pragmatic Principles | 第28-30页 |
| 2.4.3 Studies of Hedges Related to Epistemic Modality | 第30页 |
| 2.4.4 Hedge Studies with Pedagogical Aims | 第30-32页 |
| Chapter 3 Research Methodology | 第32-36页 |
| 3.1 Introduction | 第32页 |
| 3.2 Corpora Employed in the Study | 第32-33页 |
| 3.3 Procedures for Data Collection | 第33-36页 |
| 3.3.1 Determining the search items | 第33-34页 |
| 3.3.2 Identification of Hedges | 第34-36页 |
| Chapter 4 Results and Discussion | 第36-66页 |
| 4.1 Overall Distribution of Hedges in Two Corpora | 第36-43页 |
| 4.1.1 Distribution of Hedges as a Whole | 第36-38页 |
| 4.1.2 Distributions of Four Categories | 第38-39页 |
| 4.1.3 Analysis of Top 20 Hedges in the Two Corpora | 第39-43页 |
| 4.2 Distributions of Hedges in Four Categories | 第43-57页 |
| 4.2.1 Adaptors | 第43-46页 |
| 4.2.2 Rounders | 第46-47页 |
| 4.2.3 Plausibility Shields | 第47-53页 |
| 4.2.4 Attribution Shields | 第53-57页 |
| 4.3 Comparison of Hedges in Spoken and Written Language by Chinese English Major Students | 第57-59页 |
| 4.4 Pragmatic Functions of Hedges in BNC-S and SECCL-S | 第59-64页 |
| 4.4.1 Pragmatic Functions Concerning Contents | 第60-62页 |
| 4.4.2 Pragmatic Functions Concerning Participants | 第62-64页 |
| 4.5 Possible Explanations for the Above Differences | 第64-66页 |
| 4.5.1 Transfer from Chinese | 第64-65页 |
| 4.5.2 Poor Language Proficiency | 第65页 |
| 4.5.3 Lack of Guidance | 第65-66页 |
| Chapter 5 Conclusion | 第66-70页 |
| 5.1 Major Findings of the Study | 第66-67页 |
| 5.2 Pedagogical Suggestions | 第67-68页 |
| 5.2.1 Raising Awareness of Hedges | 第67-68页 |
| 5.2.3 Raising Awareness of Cultural Differences | 第68页 |
| 5.3 Limitations and Suggestions for Further Study | 第68-70页 |
| References | 第70-74页 |
| Appendices | 第74-79页 |
| Acknowledgements | 第79-80页 |
| Resume | 第80页 |
