| 摘要 | 第1-7页 |
| Abstract | 第7-15页 |
| Chapter 1 Introduction | 第15-20页 |
| ·Research background and questions of the study | 第15-17页 |
| ·The creativities and contributions of the study | 第17-18页 |
| ·The organization of the thesis | 第18-20页 |
| Chapter 2 Literature Review | 第20-30页 |
| ·From the perspective of semantics | 第20-24页 |
| ·From the perspective of pragmatics | 第24-26页 |
| ·From the perspective of discourse analysis | 第26-30页 |
| Chapter 3 Methodology and Data Collection | 第30-40页 |
| ·Theoretical foundation of the study | 第30-36页 |
| ·The theory of “Three values of modal verbs” | 第30-33页 |
| ·Interpersonal function in Systemic Functional Grammar | 第33-34页 |
| ·Coates’categorization of modal meanings | 第34-36页 |
| ·Research procedures | 第36-37页 |
| ·Data collection | 第37-40页 |
| Chapter 4 The Distribution Features and Interpersonal Functions of Modal Verbs in Three Genres | 第40-70页 |
| ·Modal verbs in laws | 第40-50页 |
| ·The genre features of laws | 第41页 |
| ·The distribution features of modal verbs in laws | 第41-43页 |
| ·Interpersonal functions of modal verbs in laws | 第43-50页 |
| ·Modal verbs in news | 第50-59页 |
| ·The genre features of news | 第50-51页 |
| ·The distribution features of modal verbs in news | 第51-54页 |
| ·Interpersonal functions of modal verbs in news | 第54-59页 |
| ·Modal verbs in research articles | 第59-70页 |
| ·The genre features of research articles | 第59-60页 |
| ·The distribution features of modal verbs in research articles | 第60-62页 |
| ·Interpersonal functions of modal verbs in research articles | 第62-70页 |
| Chapter 5 Comparative Study of Modal Verbs in Three Genres | 第70-81页 |
| ·The distribution features of modal verbs in three genres | 第70-74页 |
| ·Modality value inclination in three genres | 第74-81页 |
| ·Analysis of the differences in modality value inclination | 第75-78页 |
| ·Analysis of similarities in modality value inclination | 第78-81页 |
| Chapter 6 Conclusion | 第81-86页 |
| ·Major findings | 第81-83页 |
| ·Pedagogical implications | 第83-84页 |
| ·Limitations and suggestions for further research | 第84-86页 |
| References | 第86-91页 |
| Appendix | 第91-127页 |
| Acknowledgements | 第127-128页 |
| 作者简介 | 第128页 |
