| Acknowledgements | 第1-7页 |
| Abstract | 第7-9页 |
| 内容摘要 | 第9-11页 |
| Chapter One Introduction | 第11-16页 |
| ·Rationale of the study | 第11-13页 |
| ·Significance of the study | 第13-14页 |
| ·Organization of the thesis | 第14-16页 |
| Chapter Two Literature Review | 第16-27页 |
| ·Grammaticalization | 第16-20页 |
| ·Characteristics of grammaticalization | 第16-17页 |
| ·Mechanisms of grammaticalization | 第17-19页 |
| ·Principles in grammaticalization | 第19-20页 |
| ·Historical pragmatics | 第20-23页 |
| ·Overview of historical pragmatics | 第21页 |
| ·Pragmaphilology and diachronic pragmatics | 第21-22页 |
| ·Form-to-function mapping and function-to-form mapping in diachronic pragmatics | 第22-23页 |
| ·Pragmatic enrichment | 第23-25页 |
| ·Theoretical background of pragmatic enrichment | 第23-24页 |
| ·Pragmatic enrichment as related to grammaticalization | 第24-25页 |
| ·Grammaticalization of the Chinese preposition Zai | 第25页 |
| ·Summary | 第25-27页 |
| Chapter Three Grammaticalization and Pragmatic Enrichment | 第27-47页 |
| ·Pragmatic enrichment as a mechanism in grammaticalization | 第27-30页 |
| ·Pragmatic enrichment and decategorization in grammaticalization | 第30-34页 |
| ·Decategorization in grammaticalization:Change in prototypical properties | 第31-32页 |
| ·Pragmatic enrichment behind decategorization in grammaticalization | 第32-34页 |
| ·Pragmatic enrichment and metaphorical mapping in grammaticalization | 第34-39页 |
| ·Metaphorical mapping in grammaticalization:From lexical concrete to grammatical abstract | 第35-36页 |
| ·Pragmatic enrichment behind metaphorical mapping in grammaticalization | 第36-39页 |
| ·The integrated model of pragmatic enrichment in grammaticalization | 第39-44页 |
| ·Summary | 第44-47页 |
| Chapter Four Pragmatic Enrichment in Grammaticalization of Chinese Preposition Zai: A Historical Pragmatic Analysis | 第47-64页 |
| ·Historical development of grammaticalization of Chinese preposition Zai | 第47-48页 |
| ·Pragmatic enrichment and decategorization of the Chinese preposition Zai in its grammaticalization | 第48-51页 |
| ·Pragmatic enrichment and metaphorical mapping of the Chinese preposition Zai in its grammaticalization | 第51-54页 |
| ·The grammaticalization of the Chinese preposition Zai in the integrated model of pragmatic enrichment in grammaticalization | 第54-60页 |
| ·Summary | 第60-64页 |
| Chapter Five Conclusion | 第64-69页 |
| ·Summary of the major findings | 第64-66页 |
| ·Implications of the research | 第66-67页 |
| ·Prospects for further research | 第67-69页 |
| References | 第69-72页 |
