| ABSTRACT | 第2-4页 |
| 摘要 | 第5-9页 |
| Chapter Ⅰ Introduction | 第9-13页 |
| 1.1 Background of the Study | 第9-10页 |
| 1.2 Aims and Significance of the Study | 第10-11页 |
| 1.3 Structure of the Thesis | 第11-13页 |
| Chapter Ⅱ Literature Review | 第13-32页 |
| 2.1 Hedge | 第13-22页 |
| 2.1.1 Definition of Hedge | 第13-14页 |
| 2.1.2 Classification of Hedge | 第14-20页 |
| 2.1.3 Features of Hedge | 第20-22页 |
| 2.2 Previous Studies on Hedge | 第22-28页 |
| 2.2.1 Semantic Perspective | 第23页 |
| 2.2.2 Pragmatic Perspective | 第23-24页 |
| 2.2.3 Discourse Analysis | 第24-27页 |
| 2.2.4 Other Perspectives | 第27-28页 |
| 2.3 Public Speech and Hedge | 第28-32页 |
| 2.3.1 Definition and Classification of Public Speech | 第28-29页 |
| 2.3.2 TED Speech | 第29-30页 |
| 2.3.3 Previous Studies on Hedges in Public Speeches | 第30-32页 |
| Chapter Ⅲ Theoretical Framework | 第32-40页 |
| 3.1 Cooperative Principle | 第32-37页 |
| 3.1.1 Four Maxims under the Cooperative Principle | 第32-34页 |
| 3.1.2 Flouting the Maxims | 第34-37页 |
| 3.2 Development of Cooperative Principle | 第37-39页 |
| 3.3 Conversational Implicature | 第39-40页 |
| Chapter Ⅳ Methodology | 第40-44页 |
| 4.1 Research Questions | 第40页 |
| 4.2 Data Collection | 第40-42页 |
| 4.3 Research Procedures | 第42-44页 |
| Chapter Ⅴ Results and Discussion | 第44-79页 |
| 5.1 Distribution of Hedges in English Economic Speeches | 第44-47页 |
| 5.1.1 Overall Distribution of Hedges in English Economic Speeches | 第44页 |
| 5.1.2 Distribution of Different Types of Hedges in English Economic Speeches | 第44-47页 |
| 5.2 Linguistic Realization Forms of Hedges in English Economic Speeches | 第47-60页 |
| 5.2.1 Adaptors in English Economic Speeches | 第48-51页 |
| 5.2.2 Rounders in English Economic Speeches | 第51-54页 |
| 5.2.3 Plausibility Shields in English Economic Speeches | 第54-57页 |
| 5.2.4 Attribution Shields in English Economic Speeches | 第57-60页 |
| 5.3 Pragmatic Analysis of Hedges in English Economic Speeches Based on the Cooperative Principle | 第60-70页 |
| 5.3.1 Quality Maxim and Hedges | 第60-63页 |
| 5.3.2 Quantity Maxim and Hedges | 第63-66页 |
| 5.3.3 Relation Maxim and Hedges | 第66-68页 |
| 5.3.4 Manner Maxim and Hedges | 第68-70页 |
| 5.4 Pragmatic Functions of Hedges in English Economic Speeches | 第70-79页 |
| 5.4.1 Enhancing the Persuasiveness | 第71-73页 |
| 5.4.2 Showing the Politeness and Regard for the Audience | 第73-74页 |
| 5.4.3 Keeping the Speakers from Taking Responsibility | 第74-76页 |
| 5.4.4 Increasing the Interactions with the Audience | 第76-79页 |
| Chapter Ⅵ Conclusion | 第79-83页 |
| 6.1 Major Findings | 第79-80页 |
| 6.2 Implications of the Study | 第80-81页 |
| 6.3 Limitations of the Study | 第81-82页 |
| 6.4 Suggestions for Further Studies | 第82-83页 |
| APPENDIX | 第83-84页 |
| REFERENCE | 第84-87页 |
| ACKNOWLEDGEMENTS | 第87-88页 |
