| Acknowledgements | 第1-7页 |
| Abstract | 第7-9页 |
| 摘要 | 第9-14页 |
| Chapter 1 Introduction | 第14-17页 |
| ·Background of the Study | 第14-15页 |
| ·Significance of the Study | 第15-16页 |
| ·Overall Structure of the Thesis | 第16-17页 |
| Chapter 2 Literature Review | 第17-27页 |
| ·Definition of Polysemy | 第17-19页 |
| ·Traditional and Cognitive Studies on Polysemy | 第19-24页 |
| ·Traditional Studies on Polysemy | 第20-22页 |
| ·Cognitive Study on Polysemy | 第22-24页 |
| ·Studies of Prepositional Polysemy Abroad and at Home | 第24-27页 |
| ·Studies Abroad | 第24-25页 |
| ·Studies at Home | 第25-27页 |
| Chapter 3 Theoretical Framework and Research Methodology | 第27-34页 |
| ·Theoretical Framework | 第27-31页 |
| ·Image Schema | 第27-29页 |
| ·Three-layer Polysemic Model | 第29-31页 |
| ·Research Methodology | 第31-34页 |
| ·Research Questions | 第31-32页 |
| ·Data Collection | 第32-34页 |
| Chapter 4 An Image Schema-based Study on Polysemy of the Preposition through | 第34-66页 |
| ·“THROUGH”in Abstract Schema | 第34-43页 |
| ·Basic Structure | 第34-39页 |
| ·The Protypicality of THROUGH 1 | 第39-40页 |
| ·Meaning Extension from THROUGH 1 to THROUGH 2 | 第40-41页 |
| ·Meaning Extension from THROUGH 1 to THROUGH 3 | 第41-42页 |
| ·Meaning Extension from THROUGH 1 to THROUGH 4 | 第42-43页 |
| ·“THROUGH”in Sense Schema | 第43-58页 |
| ·Meanings Elaborated from THROUGH 1 | 第43-52页 |
| ·Meanings Elaborated from THROUGH 2 | 第52-55页 |
| ·Meanings Elaborated from THROUGH 3 | 第55-57页 |
| ·Meanings Elaborated from THROUGH 4 | 第57-58页 |
| ·“THROUGH”in Contextual Schema | 第58-63页 |
| ·THROUGH Generated from the Dimension of the Landmark | 第59-61页 |
| ·THROUGH Generated from the Dimension of the Trajector | 第61-62页 |
| ·THROUGH Generated from the Shape of the Path | 第62-63页 |
| ·Summary | 第63-66页 |
| Chapter 5 Conclusion | 第66-70页 |
| ·Major Findings of the Research | 第66-67页 |
| ·Implications of the Research | 第67-69页 |
| ·Limitations of the Research and Suggestions for Further Study | 第69-70页 |
| References | 第70-71页 |
