| 中文摘要 | 第1-10页 |
| ABSTRACT | 第10-12页 |
| Introduction | 第12-15页 |
| Chapter One An Overview of the Studies on Prepositional Polysemy | 第15-23页 |
| ·Traditional study of prepositional polysemy | 第15-18页 |
| ·Cognitive study of prepositional polysemy | 第18-21页 |
| ·Studies carried out abroad | 第18-20页 |
| ·Studies carried out at home | 第20-21页 |
| ·Summary | 第21-23页 |
| Chapter Two Theoretical Discussions | 第23-41页 |
| ·Cognitive linguistics | 第23-34页 |
| ·The definition of cognitive linguistics | 第23-24页 |
| ·Categorization and prototype theory | 第24-25页 |
| ·Image schema: basic means of semantic extension | 第25-28页 |
| ·Basic concepts: the protoscene, distinct senses, semantic network | 第28-30页 |
| ·Cognitive principles for semantic extension | 第30-34页 |
| ·Prepositional polysemy | 第34-39页 |
| ·What is prepositional polysemy? | 第34-35页 |
| ·Primary sense and criteria for determining primary sense | 第35-37页 |
| ·Distinct senses and criteria for determining distinct senses | 第37-39页 |
| ·Cognitive linguistics and prepositional polysemy | 第39-41页 |
| Chapter Three A Cognitive Analysis of the Preposition Under | 第41-68页 |
| ·The protoscene of Under | 第41-45页 |
| ·Distinct senses of Under | 第45-63页 |
| ·Locating cluster | 第46-49页 |
| ·A.B.C trajectory cluster | 第49-53页 |
| ·Being-covered-by sense | 第53-54页 |
| ·Descending cluster | 第54-63页 |
| ·Semantic network of Under | 第63-66页 |
| ·Summary | 第66-68页 |
| Chapter Four The Implications of the Present Study in Teaching Prepositions | 第68-88页 |
| ·Vocabulary learning problems of the Chinese EFL learners | 第68-69页 |
| ·Benefits of the present approach to prepositions | 第69-72页 |
| ·Proposed methods for teaching prepositions | 第72-77页 |
| ·Protoscene method and semantic network method | 第72-75页 |
| ·Presentation method, imagery method and object method | 第75-77页 |
| ·The practice of the methods | 第77-86页 |
| ·Presenting the protoscene of a preposition | 第78-79页 |
| ·Explaining the semantic extension of the preposition | 第79-83页 |
| ·Showing the semantic network of the preposition | 第83-86页 |
| ·Summary | 第86-88页 |
| Conclusion | 第88-92页 |
| Significance of the present study | 第88-89页 |
| Limitations of the present study | 第89-90页 |
| Suggestions for further study | 第90-92页 |
| Bibliography | 第92-96页 |
| Acknowledgements | 第96-97页 |
| 攻读学位期间发表的学术论文 | 第97页 |
