| 摘要 | 第4-6页 |
| Synopsis | 第6-7页 |
| Chapter One Introduction | 第11-16页 |
| 1.1 Research Background | 第11-12页 |
| 1.2 Significance of the Thesis | 第12-13页 |
| 1.3 Objectives of the Thesis | 第13-14页 |
| 1.4 Structure of the Thesis | 第14-16页 |
| Chapter Two Literature Review | 第16-34页 |
| 2.1 Hedges | 第16-22页 |
| 2.1.1 Definitions of Hedges | 第16-18页 |
| 2.1.2 Classification of Hedges | 第18-22页 |
| 2.2 Previous Studies on Hedges | 第22-26页 |
| 2.2.1 Studies on Hedges Abroad | 第22-24页 |
| 2.2.2 Studies on Hedges in China | 第24-26页 |
| 2.3 Public Interest Advertisements | 第26-29页 |
| 2.3.1 Definition of Public Interest Advertisements | 第26页 |
| 2.3.2 Classification of Public Interest Advertisements | 第26-29页 |
| 2.4 Previous Studies on Public Interest Advertisements | 第29-33页 |
| 2.4.1 Linguistic Perspective | 第29-30页 |
| 2.4.2 Semiotic Perspective | 第30-31页 |
| 2.4.3 Functional Perspective | 第31-32页 |
| 2.4.4 Value Perspective | 第32-33页 |
| 2.5 Studies on Hedges in Public Interest Advertisements | 第33-34页 |
| Chapter Three Theoretical Framework | 第34-41页 |
| 3.1 Verschueren's Adaptation Theory | 第34-40页 |
| 3.1.1 Language Choice-Making | 第34-35页 |
| 3.1.2 Basis of Language Features | 第35-37页 |
| 3.1.3 Ingredients of Adaptation Theory | 第37-40页 |
| 3.2 An Adaptation Approach to Hedges in Public Interest dvertisements | 第40-41页 |
| Chapter Four Research Methodology | 第41-47页 |
| 4.1 Research Questions | 第41页 |
| 4.2 Data Description | 第41-42页 |
| 4.3 Research Methods | 第42页 |
| 4.4 Data Collection | 第42-45页 |
| 4.5 Research Design | 第45-47页 |
| Chapter Five Comparative Analysis and Discussion | 第47-65页 |
| 5.1 Similarities and Differences between English and Chinese PublicInterest Advertisements | 第47-56页 |
| 5.1.1 Similarities of Hedges Applied in English and Chinese PublicInterest Advertisements | 第47-52页 |
| 5.1.2 Differences of Hedges Applied in English and Chinese PublicInterest Advertisements | 第52-56页 |
| 5.2 The Study of Hedges in English and Chinese Public InterestAdvertisements under Adaptation Theory | 第56-60页 |
| 5.2.1 Hedges as Adaptation to the Physical World | 第56-57页 |
| 5.2.2 Hedges as Adaptation to the Social World | 第57-59页 |
| 5.2.3 Hedges as Adaptation to the Mental World | 第59-60页 |
| 5.3 Pragmatic Functions of Hedges in English and Chinese PublicInterest Advertisements | 第60-65页 |
| 5.3.1 Avoiding Absoluteness | 第60-61页 |
| 5.3.2 Achieving Politeness | 第61-62页 |
| 5.3.3 Enhancing Acceptability | 第62-63页 |
| 5.3.4 Strengthening Persuasion | 第63-65页 |
| Chapter Six Conclusion | 第65-70页 |
| 6.1 Major Findings | 第65-66页 |
| 6.2 Implications for Future Studies | 第66-67页 |
| 6.3 Limitations of the Study | 第67-70页 |
| References | 第70-72页 |
| 作者简介及科研成果 | 第72-73页 |
| Acknowledgements | 第73页 |
