Acknowledgments
摘要
Abstract
Contents
List of Tables
Chapter One Introduction
1.1 Research Background
1.2 Research Questions
1.3 Organization of the Thesis
Chapter Two Literature Review
2.1 Overseas Studies on Null Subjects in Second Language Acquisition
2.2 Overseas Studies on Null Objects in Second Language Acquisition
2.3 Overseas Studies on the Asymmetry between Null subjects and Null Objects in Second Language Acquisition
2.4 Domestic Studies on Null Subjects and Null objects in Second Language Acquisition
2.5 Summary
Chapter Three Theoretical Framework
3.1 The UG Theory
3.2 Role of UG in Second Language Acquisition
3.3 Differences on Subjects and Objects between Chinese and English
3.3.1 From the Perspective of Pro-drop Parameter
3.3.2 From the Perspective of Topic Constructions
3.3.3 From the Perspective of Objects
3.4 Summary
Chapter Four Empirical Study
4.1 Hypotheses
4.2 Subjects
4.3 Instruments
4.4 Scoring
4.5 Results
4.5.1 Difference between Unlearning of Null subjects and Null Objects
4.5.2 Unlearning of Null Subjects and Null Objects in Matrix and Embedded Sentences
4.5.3 Unlearning of Null Referential Subjects and Null Expletive Subjects
4.5.4 Difference among the Three Groups
4.6 Summary
Chapter Five Discussion
5.1 Unlearning of Null Subjects and Null Objects
5.2 Unlearning of Null Subjects and Null Objects in Matrix and Embedded Sentences
5.2.1 Learners’ Better Performance on Unlearning of Null Arguments in Matrix Sentences than in Embedded Sentences
5.2.2 Learners’ Better Performance on Unlearning of Null Subjects in Embedded Sentences than in Matrix Sentences
5.3 Unlearning of Null Referential Subjects and Null Expletive Subjects
5.3.1 Unlearning of Null Referential Subjects and Null Expletive Subjects
5.3.2 Acquisition of Expletive Subject ‘it’ and ‘there’
5.4 Explanations for the Difference among the Three Groups
5.5 Summary
Chapter Six Conclusion
6.1 Summary of the Major Findings
6.2 Limitations of the Study and Suggestions for Future Research
6.3 Pedagogical Suggestions
Bibliography
Appendix A
Appendix B
Appendix C
声明