| 摘要 | 第1-7页 |
| ABSTRACT | 第7-8页 |
| Tables | 第8-9页 |
| Chapter 1 Introduction | 第9-16页 |
| ·Definitions and Development of Grammaticalization | 第9-10页 |
| ·Mechanisms and Motivations of Grammaticalization | 第10-13页 |
| ·Hypothesis of Unidirectionality | 第13-14页 |
| ·The Role of Frequency in Grammaticalization | 第14-15页 |
| ·Goals of the Present Study | 第15-16页 |
| Chapter 2 A Diachronic Approach | 第16-55页 |
| ·Probability-Epistemic Modals in Chinese | 第16-17页 |
| ·Historical Data | 第17-19页 |
| ·The Present Study | 第19-20页 |
| ·Old Chinese Period | 第20-34页 |
| ·DANG: From A Full Verb to An Epistemic | 第20-24页 |
| ·YI: From An Adjective to An Epistemic | 第24-29页 |
| ·YING: From A Verb to A Deontic | 第29-32页 |
| ·HE: From A Verb to A Deontic | 第32-34页 |
| ·Middle Chinese Period | 第34-40页 |
| ·Development of Bisyllabic Weak Obligation Modals | 第36-39页 |
| ·YING: From Deontic to Epistemic | 第39-40页 |
| ·Early Modern Chinese Period | 第40-43页 |
| ·GAI: From A Noun to A Deontic | 第40-42页 |
| ·Bisyllabic Weak Obligation Modals | 第42-43页 |
| ·Modern Chinese Period | 第43-53页 |
| ·Characteristics of Modern Weak Obligation Modals | 第44-45页 |
| ·Emergent Probability-Epistemic Modals | 第45-48页 |
| ·An Account for the Incomplete Grammaticalization Paths | 第48-53页 |
| ·Summary | 第53-55页 |
| Chapter 3 A Synchronic Approach | 第55-81页 |
| ·Theoretical Background | 第55-59页 |
| ·Applicability of Lehmann's Parameters in the Probability-Epistemic Modals in Chinese | 第59-65页 |
| ·Semantic Attrition | 第60页 |
| ·Paradigmatic Variability | 第60-62页 |
| ·Scope | 第62-63页 |
| ·Syntagmatic Variability | 第63-65页 |
| ·Criteria Based on Chinese Facts | 第65-79页 |
| ·A-not-A Questions | 第66-70页 |
| ·Modifiability by Intensifiers | 第70-73页 |
| ·Nominalizability | 第73-77页 |
| ·Independence in Ellipsis | 第77-79页 |
| ·Summary | 第79-81页 |
| Chapter 4 Typological Evidence for the Grammatiealization Cline | 第81-87页 |
| ·Theoretical Background | 第81页 |
| ·Typological Evidence From English | 第81-84页 |
| ·Typological Evidence From Other Languages | 第84-85页 |
| ·Summary | 第85-87页 |
| Conclusion | 第87-89页 |
| References | 第89-93页 |
| Acknowledgements | 第93-94页 |
| Appendix A(攻读学位期间所发表的学术论文目录) | 第94-95页 |
| Appendix B(中文摘要) | 第95-97页 |
