| Acknowledgements | 第1-4页 |
| 摘要 | 第4-5页 |
| Abstract | 第5-6页 |
| Contents | 第6-8页 |
| Chapter 1 Introduction | 第8-10页 |
| ·Research Background | 第8页 |
| ·Research Questions | 第8-9页 |
| ·Organization of the Thesis | 第9-10页 |
| Chapter 2 Null Arguments in English and Chinese | 第10-14页 |
| ·Null Subjects in English and Chinese | 第10-12页 |
| ·Null Objects in English and Chinese | 第12-14页 |
| Chapter 3 Literature Review | 第14-23页 |
| ·The Unlearning of English Null Arguments by L1-Chinese Learners | 第14-19页 |
| ·The Acquisition of Chinese Null Arguments by L1-English Learners | 第19-23页 |
| Chapter 4 An Empirical Study on the Unlearning of English Null Arguments by L1-Chinese Learners | 第23-29页 |
| ·Research Questions | 第23页 |
| ·Data Collection and Analysis | 第23-24页 |
| ·Results | 第24-29页 |
| ·The Use of English Subjects and Objects | 第24-25页 |
| ·The Effects of Argument Nature and Positions on the Use of English Subjects | 第25-27页 |
| ·The Effects of Argument Nature and Positions on the Use of English Objects | 第27-28页 |
| ·Summary | 第28-29页 |
| Chapter 5 An Empirical Study on the Acquisition of Chinese Null Arguments by L1-English Learners | 第29-36页 |
| ·Research Questions | 第29页 |
| ·Data Collection and Analysis | 第29-30页 |
| ·Results and Discussion | 第30-36页 |
| ·An Asymmetry of Null Subjects and Null Objects | 第30-31页 |
| ·The Effects of Argument Nature and Positions on the Use of Chinese Subjects | 第31-33页 |
| ·The Effects of Argument Nature and Positions on the Use of Chinese Objects | 第33-35页 |
| ·Summary | 第35-36页 |
| Chapter 6 General Discussion | 第36-41页 |
| ·A Discussion on the Asymmetry of Null Subjects and Null Objects | 第36-37页 |
| ·The Asymmetry of Null Subjects and Null Objects by L1-English Learners of Chinese | 第36页 |
| ·The Asymmetry of Null Subjects and Null Objects by L1-Chinese Learners of English | 第36-37页 |
| ·A Discussion on the Effects of Argument Nature and Positions on the Use of Subjects and Objects | 第37-38页 |
| ·The Interpretation of the Asymmetry of Null Subjects and Null Objects | 第38-41页 |
| ·L2 Input and Parameter Reset | 第38-39页 |
| ·The Role of L1 and UG in L2 Acquisition | 第39-41页 |
| Chapter 7 Concluding Remarks | 第41-43页 |
| ·Major Findings | 第41页 |
| ·The Significance of the Study | 第41-42页 |
| ·Limitations | 第42-43页 |
| Bibliography | 第43-46页 |
| Publication | 第46-48页 |
