| Abstract | 第1-6页 |
| 摘要 | 第6-7页 |
| Contents | 第7-9页 |
| Introduction | 第9-14页 |
| Chapter One Literature Review | 第14-23页 |
| ·Traditional Grammar | 第14-15页 |
| ·Cognitive Linguistics | 第15-18页 |
| ·The Approach of Pragmatics | 第18-20页 |
| ·The Study of Grammaticalization | 第20-21页 |
| ·Summary | 第21-23页 |
| Chapter Two Theoretical Issues and Concepts | 第23-33页 |
| ·Subjectification in Cognitive Grammar | 第23-26页 |
| ·Subjectification in Grammaticalization | 第26-30页 |
| ·Theoretical Basis of this Thesis | 第30-31页 |
| ·Summary | 第31-33页 |
| Chapter Three The Evolution of English Progressive | 第33-45页 |
| ·The Progressive Meaning | 第33-35页 |
| ·Sketch of Historical Development to an Aspectual Marker | 第35-41页 |
| ·Old English Period | 第36-38页 |
| ·Middle English Period | 第38-39页 |
| ·Modern English Period | 第39-41页 |
| ·The Route of Evolution | 第41-42页 |
| ·Summary | 第42-45页 |
| Chapter Four The Functional Extension of the Progressive towards Denoting Future | 第45-59页 |
| ·Future Tense and Subjectification | 第45-47页 |
| ·The Future Marker be going to | 第47-54页 |
| ·The View of Cognition | 第47-49页 |
| ·The View of Grammaticalization | 第49-53页 |
| ·Other Two Related Studies | 第53-54页 |
| ·Concrete Verbs in the Progressive | 第54-57页 |
| ·Summary | 第57-59页 |
| Chapter Five The Functional Extension of English Progressive towards Stative Verbs | 第59-69页 |
| ·Restrictions on the Usage of Stative Verbs in the Progressive | 第59-60页 |
| ·Stative Verbs in the Progressive | 第60-65页 |
| ·Supporting Evidence of Chinese Progressive Marker zhe | 第65-66页 |
| ·Summary | 第66-69页 |
| Chapter Six The Functional Extension of English Progressive towards Denoting Tactfulness | 第69-79页 |
| ·The Function of Tentativeness and Politeness | 第69-74页 |
| ·The Function of Emphasis | 第74-76页 |
| ·The Hierarchy of Tactfulness | 第76-77页 |
| ·Summary | 第77-79页 |
| Conclusion | 第79-83页 |
| Bibliography | 第83-87页 |
| Appendix | 第87-89页 |
| Acknowledgements | 第89-90页 |
