| Acknowledgements | 第1-5页 |
| Abstract in Chinese | 第5-6页 |
| Abstract in English | 第6-10页 |
| Chapter One Introduction | 第10-15页 |
| ·Discourse Markers | 第10-11页 |
| ·Previous Researches on Discourse Markers | 第11-13页 |
| ·Objectives of the Present Study | 第13-14页 |
| ·The Organization of the Thesis | 第14-15页 |
| Chapter Two Defining of the Discourse Markers | 第15-26页 |
| ·Previous Definitions | 第15-21页 |
| ·The Discourse-coherence-based Perspective | 第16-18页 |
| ·The Grammatical-pragmatic Perspective | 第18-21页 |
| ·The Cognitive-pragmatic Perspective | 第21页 |
| ·Working Definition | 第21-24页 |
| ·Summary | 第24-26页 |
| Chapter Three Description of Theoretic Framework | 第26-36页 |
| ·Verschuren’s Adaptation Theory | 第26-29页 |
| ·Three Properties of Discourse Markers | 第29-33页 |
| ·Variability of Discourse Markers | 第29-30页 |
| ·Negotiability of Discourse Markers | 第30-32页 |
| ·Adaptability of Discourse Markers | 第32-33页 |
| ·Adaptation Model of Discourse Markers | 第33-36页 |
| Chapter Four Adaptive Objects in the Choice of Discourse Markers | 第36-51页 |
| ·Discourse Markers as a Choice of Adaptation to the Linguistic Reality | 第36-42页 |
| ·Adaptation to Be a Signal of Information Receipt | 第37-39页 |
| ·Adaptation to Be a signal of Comments | 第39-40页 |
| ·Adaptation to Be a Signal of Filler | 第40-42页 |
| ·Discourse Markers as a Choice of Adaptation to Social Convention-Politeness | 第42-47页 |
| ·The Meaning of Politeness | 第42-43页 |
| ·A Face-threat Mitigator-Choice of Discourse Markers as an Adaptation to Politeness | 第43-47页 |
| ·Adaptation to Mental World | 第47-51页 |
| ·Adaptation to Humor-creating | 第48页 |
| ·Adaptation to Hedge-building | 第48-51页 |
| Chapter Five Discourse Markers as Indicators of Metapragmatic Awareness | 第51-58页 |
| ·Metapragmatic Awareness | 第51-52页 |
| ·Metapragmatic Awareness in the Choice of Discourse Markers | 第52-58页 |
| ·Hesitation | 第53-56页 |
| ·Reformulation | 第56-58页 |
| Chapter Six Conclusion | 第58-66页 |
| ·Major Findings | 第58-63页 |
| ·The Significance of the Present Study | 第63-64页 |
| ·Remaining Problems and Topics for Further Study | 第64-66页 |
| Bibliography | 第66-70页 |
