| Acknowledgements | 第1-4页 |
| Abstract | 第4-5页 |
| 内容摘要 | 第5-6页 |
| List of Abbreviations and Symbols | 第6-7页 |
| List of Tables | 第7-11页 |
| 1. Introduction | 第11-15页 |
| ·Trigger of the research | 第11-13页 |
| ·Outline of the thesis | 第13-15页 |
| 2. Literature review | 第15-35页 |
| ·Literature review of DMs | 第15-29页 |
| ·Diversified terminology | 第15-18页 |
| ·Studies of DMs in various languages | 第16页 |
| ·Studies of various alternatives of DMs | 第16-18页 |
| ·Overview of researches on DMs | 第18-23页 |
| ·Previous studies and definitions of DMs | 第18-21页 |
| ·Basic features of DMs | 第21-23页 |
| ·Theoretical approaches to DMs | 第23-29页 |
| ·Coherence-based approach | 第23-26页 |
| ·Relevance-theoretical approach | 第26-29页 |
| ·Overview of previous studies of you know | 第29-34页 |
| ·Studies of you know abroad | 第29-33页 |
| ·Studies of you know in China | 第33-34页 |
| ·Summary | 第34-35页 |
| 3. An analysis of you know as a DM | 第35-51页 |
| ·Properties of you know as a DM | 第35-40页 |
| ·Syntactic structure of you know | 第35-38页 |
| ·Syntactic position & phonological form of you know | 第38-40页 |
| ·Definition of you know in dictionaries | 第40-43页 |
| ·A brief discussion on the function and use of You know | 第43-46页 |
| ·Research methodology & data collection | 第46-51页 |
| ·Description of the target data | 第46-48页 |
| ·Methodology adopted in this research | 第48-51页 |
| 4. Functions of You know from textual perspective | 第51-65页 |
| ·You know functions at the clause level | 第51-52页 |
| ·You know functions at the textual level | 第52-65页 |
| ·You know as a transition marker | 第53-56页 |
| ·You know introducing explanation | 第56-57页 |
| ·You know introducing questions | 第57-58页 |
| ·You know introducing evaluation/comment | 第58-59页 |
| ·You know as a repair marker | 第59-61页 |
| ·You know as a correcting marker | 第61-62页 |
| ·You know as a turn-management marker | 第62-65页 |
| 5. Functions of you know from interactional perspective | 第65-80页 |
| ·You know as a contemplation marker | 第65-68页 |
| ·You know as a coherence-achieving marker | 第68-70页 |
| ·You know as a mitigation marker | 第70-75页 |
| ·You know as an insufficiency marker | 第75-77页 |
| ·You know as an argumentative marker | 第77-80页 |
| 6. Factors influencing the use of you know | 第80-91页 |
| ·Variables of speech content | 第80-86页 |
| ·Interaction situation | 第82-84页 |
| ·Speech genre | 第84-86页 |
| ·Variables of speaker | 第86-90页 |
| ·Social class difference | 第86-87页 |
| ·Gender difference | 第87-89页 |
| ·Age difference | 第89-90页 |
| ·Summary | 第90-91页 |
| 7. Conclusion | 第91-94页 |
| ·Summary of the significance and major findings | 第91-92页 |
| ·Limitations of the present study | 第92-93页 |
| ·Suggestions for further research | 第93-94页 |
| Bibliography | 第94-105页 |
| Appendix | 第105-109页 |
