| Abstract | 第1-6页 |
| 摘要 | 第6-11页 |
| Introduction | 第11-15页 |
| ·Background of the Study | 第11-13页 |
| ·Goals of the Study | 第13页 |
| ·Layout of the Thesis | 第13-15页 |
| Chapter One Literature Review | 第15-33页 |
| ·Previous Studies on the Past Tense | 第15-22页 |
| ·Studies on the Past Tense as a Verb Form Expressing Time | 第16-18页 |
| ·Studies on the Past Tense as a Verb Form Expressing Time Relation | 第18-22页 |
| ·Comments on the Previous Studies on the Past Tense | 第22-32页 |
| ·Comments on the "Time" View | 第22-27页 |
| ·Comments on the "Time Relation" View | 第27-32页 |
| ·Summary | 第32-33页 |
| Chapter Two Theoretical Foundation | 第33-45页 |
| ·The Prototype Theory | 第33-36页 |
| ·Image Schema | 第36-37页 |
| ·Conceptual Blending Theory | 第37-41页 |
| ·The Theory of Conversational Implicature | 第41-43页 |
| ·Summary | 第43-45页 |
| Chapter Three A Cognitive Study of the Polysemy of the Past Tense | 第45-77页 |
| ·The Past Tense as a Prototype Category | 第45-59页 |
| ·The Prototype of the Past Tense | 第47-53页 |
| ·The Non-Prototypes of the Past Tense | 第53-59页 |
| ·Relations Between the Prototype and the Non-Prototypes of the Past Tense Category | 第59页 |
| ·The Extension of The Past Tense from the Prototype to the Non-Prototypes | 第59-75页 |
| ·The Motivation of the Extension | 第61-69页 |
| ·To Realize Speaker'S Perspective | 第64-65页 |
| ·To Realize Speaker'S Affects | 第65-66页 |
| ·To Realize Speaker'S Modality | 第66-69页 |
| ·The Mechanism of the Extension | 第69-75页 |
| ·Conceptual Blending and the English Tense | 第70-72页 |
| ·Conceptual Blending and the Past Tense | 第72-75页 |
| ·Summary | 第75-77页 |
| Chapter Four A Pragmatic Study of the Polysemy of the Past Tense | 第77-91页 |
| ·Objective Time Relations of Distance and Their Conversational Implicatures | 第77-81页 |
| ·Subjective Time Relations of Distance and Their Conversational Implicatures | 第81-90页 |
| ·To Express Hypotheses | 第82-84页 |
| ·To Express Politeness | 第84-89页 |
| ·To Express Indirect Warnings | 第89-90页 |
| ·Summary | 第90-91页 |
| Conclusion | 第91-95页 |
| 1. Work Done in the Thesis | 第91页 |
| 2. Findings of the Study | 第91-92页 |
| 3. Limitations of the Study | 第92-95页 |
| Bibliography | 第95-99页 |
| Acknowledgements | 第99-101页 |
