| ACKNOWLEDGMENTS | 第1-6页 |
| ABSTRACT | 第6-9页 |
| 摘要 | 第9-18页 |
| CHAPTER ONE INTRODUCTION | 第18-24页 |
| ·Background | 第18-20页 |
| ·Necessity of the Present Study | 第20-22页 |
| ·Significance of the Present Study | 第22页 |
| ·Organization of This Thesis | 第22-24页 |
| CHAPTER TWO LITERATURE REVIEW | 第24-41页 |
| ·Key Terms | 第24-26页 |
| ·Previous Studies on EFL Learners' Preposition Acquisition | 第26-33页 |
| ·Previous Studies on EFL Learners' Preposition Use Abroad | 第27-30页 |
| ·Previous Studies on Chinese EFL Learners' Preposition Use | 第30-33页 |
| ·Previous Studies on the Lexicographical Treatment of Prepositions | 第33-37页 |
| ·Treatment of Preposition Usage Information in Existing Dictionaries | 第37-40页 |
| ·Research Gap | 第40-41页 |
| CHAPTER THREE THEORETICAL CONSIDERATIONS | 第41-60页 |
| ·An Overview of the Bidirectional System Theory | 第41-48页 |
| ·The Direction from Specific to General | 第42-45页 |
| ·The Direction from General to Specific | 第45-47页 |
| ·An Integration of Lexicographical Structures as a System | 第47-48页 |
| ·Error Analysis and Design Features of Learner's Dictionaries | 第48-56页 |
| ·Design Features based on Error Analysis | 第48-49页 |
| ·Information Categories based on Preposition Error Analysis | 第49-54页 |
| ·Lexicographical Presentation based on Preposition Error Analysis | 第54-55页 |
| ·Lexicographical Presentation based on the Study of Reference Skills | 第55-56页 |
| ·Feasibility of Bidirectional System Theory for Presenting Preposition Usage Information | 第56-59页 |
| ·Summary | 第59-60页 |
| CHAPTER FOUR METHODOLOGY | 第60-70页 |
| ·Specific Research Questions | 第60-61页 |
| ·Subjects | 第61页 |
| ·Instruments | 第61-62页 |
| ·Data Collection | 第62-68页 |
| ·Collecting Data from the Survey Study | 第63-67页 |
| ·Collecting Data from the Dictionary Text Study | 第67-68页 |
| ·Data Analysis | 第68-69页 |
| ·Analyzing the Data Collected from the Survey Study | 第68-69页 |
| ·Analyzing the Data Collected from the Dictionary Text Study | 第69页 |
| ·Summary | 第69-70页 |
| CHAPTER FIVE RESULTS AND DISCUSSION | 第70-95页 |
| ·Results from the Survey Study and Reflections | 第70-85页 |
| ·Results from the Preposition Test | 第70-75页 |
| ·Reflections on the Subjects' Preposition Errors | 第75-76页 |
| ·Results from the Questionnaire Survey and Interviews | 第76-84页 |
| ·Reflections on the Subjects' Needs of Preposition Usage Information in ECLDs | 第84-85页 |
| ·Results from the Dictionary Text Study and Reflections | 第85-90页 |
| ·Major Problems with the Treatment of Preposition Usage Information in ECLDs | 第85-89页 |
| ·Reflections on the Causes of the Major Problems | 第89-90页 |
| ·Presenting Preposition Usage Information with a Bidirectional System | 第90-95页 |
| ·The Categories of Preposition Usage Information | 第90-92页 |
| ·A Bidirectional Model for Presenting Preposition Usage Information | 第92-95页 |
| CHAPTER SIX CONCLUSION | 第95-99页 |
| ·Major Findings | 第95-97页 |
| ·Implications of the Present Study | 第97-98页 |
| ·Limitalions of the Present Study and Suggestions for Further Research | 第98-99页 |
| REFERENCES | 第99-103页 |
| AppendiX Ⅰ | 第103-112页 |
| Appendix Ⅱ | 第112-115页 |
| Appendix Ⅲ | 第115-120页 |
| Appendix Ⅳ | 第120-121页 |
