| 摘要 | 第1-5页 |
| Abstract | 第5-7页 |
| Acknowledgements | 第7-8页 |
| List of Abbreviations | 第8-12页 |
| Chapter One Introduction | 第12-17页 |
| ·Research Background | 第12-15页 |
| ·Significance and Objective of the Thesis | 第15-16页 |
| ·Layout of the Thesis | 第16-17页 |
| Chapter Two Literature Review | 第17-41页 |
| ·Introduction | 第17页 |
| ·The Learning of Wh-Questions | 第17-32页 |
| ·A Brief Introduction to English Wh-Questions | 第17-20页 |
| ·Difficulties of Learning Wh-Questions | 第20-22页 |
| ·The Behaviourist Approach to Wh-Questions | 第22-24页 |
| ·Transformational Generative Approach to Wh-Questions | 第24-25页 |
| ·Usage-based Approach to Wh-Questions | 第25-29页 |
| ·Related Empirical Studies on Acquisition of Wh-Question Formation | 第29-32页 |
| ·Frequency Effect | 第32-39页 |
| ·Diachronic Development of Frequency Effects | 第32-34页 |
| ·Classification of Frequency | 第34-35页 |
| ·Token Frequency vs. Type Frequency | 第35-39页 |
| ·Summary | 第39-41页 |
| Chapter Three Methodology | 第41-51页 |
| ·Research Questions | 第41页 |
| ·Subjects | 第41-42页 |
| ·Target Structure | 第42-43页 |
| ·Instruments | 第43-45页 |
| ·Pretest and Posttest | 第43-44页 |
| ·Output Practice | 第44页 |
| ·The Interview | 第44-45页 |
| ·Research Procedure | 第45-49页 |
| ·Data Collection and Analysis | 第49-51页 |
| Chapter Four Results and Discussion | 第51-59页 |
| ·Description of the Results | 第51-54页 |
| ·Results of the Pre-test and Post-test | 第51-52页 |
| ·Effects of Type Frequency Instruction and Token Frequency Instruction | 第52-53页 |
| ·Differential Effects between the Type Frequency Instruction and TokenFrequency Instruction | 第53-54页 |
| ·Discussion | 第54-59页 |
| ·Discussion Based on Research Question One | 第54-56页 |
| ·Discussion Based on Research Question Two | 第56-59页 |
| Chapter Five Conclusion | 第59-62页 |
| ·Major Findings | 第59-60页 |
| ·Pedagogical Implications | 第60页 |
| ·Limitations and Suggestions for Future Research | 第60-62页 |
| References | 第62-67页 |
| Appendix A Materials Used for Output Practice | 第67-70页 |
| Appendix B Exemplars of Target Structures Used for Each Group in Output Practice | 第70-72页 |
| Appendix C Pretest | 第72-74页 |
| Appendix D Posttest | 第74-75页 |
