| 摘要 | 第1-7页 |
| Abstract | 第7-13页 |
| Chapter 1 Introduction | 第13-18页 |
| ·Realms and aim of present study | 第13-16页 |
| ·Outline of the present study | 第16-18页 |
| Chapter 2 Literature Review | 第18-28页 |
| ·Grammaticalization and lexicalization | 第18-24页 |
| ·Grammaticalization | 第18-20页 |
| ·Lexicalization | 第20-22页 |
| ·Relationship and distinction between grammaticalization and lexicalization | 第22-24页 |
| ·Langacker’s theory and his symbolic units | 第24-27页 |
| ·Summary | 第27-28页 |
| Chapter 3 Unit Status and Frequency within the Frame of Cognitive Grammar | 第28-48页 |
| ·Introduction | 第28-29页 |
| ·The distinctions between grammatical items and lexical items | 第29-36页 |
| ·Frequency in the process of grammaticalization | 第36-42页 |
| ·Frequency in the process of lexicalization | 第42-46页 |
| ·Summary | 第46-48页 |
| Chapter 4 Economy Principle in Language, Grammaticalization and Lexicalization | 第48-62页 |
| ·Introduction | 第48-50页 |
| ·Low magnitude with economy | 第50-53页 |
| ·Entrenchment and the economy principle in language | 第53-57页 |
| ·Constructive effort saving and entrenchment | 第53-55页 |
| ·Entrenchment and hearer’s economy and speaker’s economy | 第55-57页 |
| ·The economy of grammaticalization and lexicalization | 第57-61页 |
| ·Summary | 第61-62页 |
| Chapter 5 Unidirectional Mechanism of Grammaticalization and Lexicalization | 第62-84页 |
| ·Introduction | 第62-64页 |
| ·Intension and context expansion in grammaticalization | 第64-68页 |
| ·Reanalysis and unidirectionality of grammaticalization and lexicalization | 第68-82页 |
| ·Summary | 第82-84页 |
| Chapter 6 Conclusion | 第84-90页 |
| References | 第90-95页 |
| Acknowledgements | 第95-96页 |
| 作者简介 | 第96页 |
