| Abstract | 第4-5页 |
| 摘要 | 第6-9页 |
| Chapter One Introduction | 第9-13页 |
| 1.1 Research Background | 第9-10页 |
| 1.2 Research Questions | 第10页 |
| 1.3 Research Significance | 第10-11页 |
| 1.4 Organization of the Thesis | 第11-13页 |
| Chapter Two Literature Review | 第13-27页 |
| 2.1 An Overview of Presupposition | 第13-19页 |
| 2.1.1 The Philosophical Background of Presupposition | 第13-14页 |
| 2.1.2 The Semantic Approach to Presupposition | 第14-15页 |
| 2.1.3 The Pragmatic Approach to Presupposition | 第15-17页 |
| 2.1.4 Classification of Pragmatic Presupposition | 第17-19页 |
| 2.2 Previous Studies on Pragmatic Presupposition | 第19-26页 |
| 2.2.1 Studies on Pragmatic Presupposition in General | 第19-23页 |
| 2.2.2 Studies on Pragmatic Presupposition in News Headlines | 第23-26页 |
| 2.3 Summary | 第26-27页 |
| Chapter Three Theoretical Framework | 第27-34页 |
| 3.1 Relevance Theory | 第27-31页 |
| 3.1.1 Cognitive Context | 第28-29页 |
| 3.1.2 Two Principles of Relevance | 第29页 |
| 3.1.3 Optimal Relevance | 第29-30页 |
| 3.1.4 Ostensive-inferential Communication | 第30页 |
| 3.1.5 Contextual Effects Within Relevance | 第30-31页 |
| 3.2 Relevance and Pragmatic Presupposition | 第31-32页 |
| 3.2.1 Ostensive-inferential Communication and Pragmatic Presupposition | 第31-32页 |
| 3.2.2 Optimal Relevance and Pragmatic Presupposition | 第32页 |
| 3.3 Summary | 第32-34页 |
| Chapter Four Research Methodology | 第34-37页 |
| 4.1 Data Collection | 第34页 |
| 4.2 Data Identification | 第34-35页 |
| 4.3 Research Procedures | 第35-37页 |
| Chapter Five Results and Discussion | 第37-63页 |
| 5.1 Pragmatic Presuppositions Used in English News Headlines | 第37-38页 |
| 5.2 Ostension-inference of Pragmatic Presupposition in News Headlines | 第38-58页 |
| 5.2.1 Ostensive-inferential Communication Model in PragmaticPresupposition | 第39-48页 |
| 5.2.2 Pragmatic Presupposition in English News Headlines Based on Ostensive-inferential Communication Model | 第48-58页 |
| 5.3 Contextual Effects of Pragmatic Presupposition in English News Headlinesin Relevance Context | 第58-61页 |
| 5.3.1 Expanding the Amount of Information in News Headlines | 第59-60页 |
| 5.3.2 Enlarging Convincing Effect of News | 第60-61页 |
| 5.3.3 Creating Suspense and Increasing Attractiveness of News | 第61页 |
| 5.4 Summary | 第61-63页 |
| Chapter Six Conclusion | 第63-66页 |
| 6.1 Major Findings | 第63-64页 |
| 6.2 Implications of the Study | 第64页 |
| 6.3 Limitations and Suggestions for Future Research | 第64-66页 |
| References | 第66-69页 |
| Appendix | 第69-77页 |
| Acknowledgements | 第77页 |
