| Acknowledgements | 第4-5页 |
| 摘要 | 第5-6页 |
| Abstract | 第6页 |
| Introduction | 第9-19页 |
| 0.1 Introduction to Sinclair Lewis and His Career as a Writer | 第9-11页 |
| 0.2 Background Information of the Writing of Free Air | 第11-13页 |
| 0.2.1 A Brief History of the Early 20th Century in America | 第11-12页 |
| 0.2.2 The Writing of Free Air | 第12-13页 |
| 0.3 Literature Review on Free Air | 第13-16页 |
| 0.3.1 Literature Review on Free Air abroad | 第13-14页 |
| 0.3.2 Literature Review on Free Air at home | 第14-16页 |
| 0.4 The Significance of the Study | 第16-17页 |
| 0.5 Space Image and Cultural Representation Applied in This Thesis | 第17-19页 |
| Chapter One The Urban Space Images and Urban Cultural Representation | 第19-31页 |
| 1.1 "Humorous"and "Hectic" Brooklyn in New York | 第20-23页 |
| 1.1.1 Vaudeville and Theatre | 第20-22页 |
| 1.1.2 Mansion and Dock | 第22-23页 |
| 1.2 "Picturesque" and "Luxurious" Seattle | 第23-29页 |
| 1.2.1 Eugene Gilson's House and Garage | 第24-27页 |
| 1.2.2 University | 第27-29页 |
| 1.3 The Urban Culture Represented by Characters | 第29-31页 |
| 1.3.1 "Confined" Claire Boltwood | 第29-30页 |
| 1.3.2 Claire Boltwood's "Nerve-twitching" Father | 第30-31页 |
| Chapter Two The Rural Space Images and Rural Cultural Representation | 第31-39页 |
| 2.1 "Conservative" Business District and "Patriarchal" Adolph Zolzac's House in Schoenstorm | 第32-34页 |
| 2.2 "Backward" Hotel of Gopher Prairie | 第34-36页 |
| 2.3 The Rural Culture Represented by Characters | 第36-39页 |
| 2.3.1 "Enterprising" Milt Daggett | 第36-37页 |
| 2.3.2 "Braggart" Pinky Parrott | 第37-39页 |
| Chapter Three The Natural Space Images and Cultural Representation | 第39-50页 |
| 3.1 "Free" Missouri River | 第40-41页 |
| 3.2 "Sublime" Grand Canyon of the Yellowstone National Park | 第41-43页 |
| 3.3 The Transformation of the Protagonists and Cultural Representation | 第43-50页 |
| 3.3.1 The Transformation of the Protagonists | 第44-47页 |
| 3.3.1.1 The Transformation of Claire Boltwood | 第44-46页 |
| 3.3.1.2 The Transformation of Milt Daggett | 第46-47页 |
| 3.3.2 Cultural Representation and Sinclair Lewis's Cultrual Position | 第47-50页 |
| Conclusion | 第50-54页 |
| Works Cited | 第54-57页 |
