| 摘要 | 第1-6页 |
| Abstract | 第6-9页 |
| 1 Introduction | 第9-12页 |
| ·Background of the Study | 第9-10页 |
| ·Significance of the Study | 第10页 |
| ·Structure of the Study | 第10-12页 |
| 2 Literature Review | 第12-29页 |
| ·Definition of Discourse Markers | 第12-13页 |
| ·Different Approaches of the Research on Discourse Markers | 第13-17页 |
| ·Semantic-pragmatic Approach | 第13-15页 |
| ·Syntactic-pragmatic Approach | 第15-16页 |
| ·Cognitive-pragmatic Approach | 第16-17页 |
| ·Introduction of Contrastive Discourse Markers | 第17-21页 |
| ·Syntactic Patterns of CDMs | 第18页 |
| ·Syntactic Types of CDMs | 第18-19页 |
| ·Semantic Properties of CDMs | 第19-20页 |
| ·Procedural Meaning of CDMs | 第20页 |
| ·Cognitive Motivation for Using CDMs | 第20-21页 |
| ·Relevance Theory | 第21-26页 |
| ·Ostensive-inferential Communication | 第22-23页 |
| ·The Principle of Relevance | 第23-24页 |
| ·Relevance-based Context | 第24-26页 |
| ·Classification of the Pragmatic Functions of the DMs Based on RT | 第26页 |
| ·Related Studies of Discourse Markers | 第26-29页 |
| 3 Methodology | 第29-31页 |
| ·Research Purpose | 第29页 |
| ·Research Questions | 第29-30页 |
| ·Data Collection | 第30-31页 |
| 4 Data Analysis and Discussion | 第31-46页 |
| ·Frequency of but and anyway in Friends | 第31-32页 |
| ·Pragmatic Functions of but in Friends | 第32-41页 |
| ·But as a Denial Marker | 第32-33页 |
| ·But as a Strengthening Marker | 第33-34页 |
| ·But as a Topic-shifting Marker | 第34-35页 |
| ·But as a Turn-talking Marker | 第35-36页 |
| ·But as a Contrast Marker | 第36-37页 |
| ·But as a Supplemental Marker | 第37-38页 |
| ·But as a Correcting Marker | 第38-39页 |
| ·But as a Hesitation Marker | 第39-40页 |
| ·But as a Objection Marker | 第40-41页 |
| ·Pragmatic Functions of anyway in Friends | 第41-46页 |
| ·Anyway as a Denial Marker | 第41-42页 |
| ·Anyway as a Topic-shifting Marker | 第42-43页 |
| ·Anyway as a Mitigation Marker | 第43-45页 |
| ·Anyway as a Strengthening Marker | 第45-46页 |
| 5 Conclusion | 第46-48页 |
| ·Major Findings | 第46-47页 |
| ·Limitation | 第47页 |
| ·Suggestions for Further Study | 第47-48页 |
| References | 第48-50页 |
| Acknowledgements | 第50-51页 |
