| Chapter 1 Introduction | 第1-25页 |
| ·Background to the problem | 第12页 |
| ·Previous empirical research and findings | 第12-17页 |
| ·Research findings abroad | 第12-16页 |
| ·Research findings at home | 第16-17页 |
| ·Research questions | 第17-19页 |
| ·Introduction to terms | 第19-24页 |
| ·Organization of the thesis | 第24-25页 |
| Chapter 2 Research Design and Methodology | 第25-32页 |
| ·Research design | 第25页 |
| ·Subjects | 第25-26页 |
| ·Procedures | 第26-28页 |
| ·Questionnaire study | 第26页 |
| ·Case study | 第26-28页 |
| ·Data collecting and analysis | 第28-32页 |
| Chapter 3 Results and Analysis | 第32-59页 |
| ·Results of the questionnaire study | 第32-39页 |
| ·Frequency of L1/L2 use in each stage | 第32-34页 |
| ·Correlation between the frequency of L1/L2 use in each stage and L2 proficiency | 第34-37页 |
| ·Partial correlation between L2 writing habit, L2 proficiency level and the frequency of L1/L2 use in each stage | 第37-39页 |
| ·Results of the case study | 第39-56页 |
| ·Quality of the L2 writing | 第40-41页 |
| ·Frequency of L1 use in their L2 writing process | 第41-43页 |
| ·L1 use and L2 writing quality generally | 第43-45页 |
| ·Occasions of L1 use | 第45-49页 |
| ·Influence of L1 use on specific occasions on the L2 writing quality | 第49-56页 |
| ·Summary | 第56-59页 |
| ·L2 writing habit and the frequency of L1 use in each stage | 第56-57页 |
| ·Correlation between L2 proficiency level and frequency of L1 use in each stage | 第57页 |
| ·L1 use in each writing stage and L2 writing quality | 第57-58页 |
| ·L1 use on Various occasions and L2 writing quality | 第58-59页 |
| Chapter 4 Discussion and Comparison | 第59-75页 |
| ·Frequency of L1 use and L2 proficiency level | 第59-61页 |
| ·Frequency of L1 use in each writing stage | 第59-60页 |
| ·Frequency of L1 use in L2 writing process and L2 proficiency level | 第60-61页 |
| ·L2 writing habits and L2 writing quality | 第61-64页 |
| ·Influence of L1 use on L2 writing quality | 第64-68页 |
| ·Influence of L1 use in each stage on L2 writing quality | 第64-65页 |
| ·L1 use on specific occasions and the L2 writing quality generally | 第65-67页 |
| ·L1 use on specific occasions and the L2 writing quality for high and low L2 proficiency writers | 第67-68页 |
| ·Comparison | 第68-72页 |
| ·Comparison with research findings abroad | 第68-70页 |
| ·Comparison with research findings at home | 第70-72页 |
| ·Summary | 第72-75页 |
| ·Frequency of L1 in the L2 writing process and L2 proficiency level | 第72页 |
| ·Occasions of L1 use in the L2 writing process | 第72-73页 |
| ·L1 use in the L2 writing process and L2 writing quality | 第73页 |
| ·L1 use on specific occasions and L2 writing quality | 第73-75页 |
| Chapter 5 Conclusion | 第75-83页 |
| ·Overview | 第75-76页 |
| ·Findings of the present study | 第76-79页 |
| ·Frequency of L1 use in each stage of the L2 writing process | 第76页 |
| ·Occasions of L1 use in the L2 writing process | 第76-77页 |
| ·Correlation between the frequency of L1 use and L2 proficiency level | 第77页 |
| ·General and specific L1 use in the L2 writing process and L2 writing quality | 第77-79页 |
| ·Pedagogical implications | 第79-80页 |
| ·Limitations of the study and directions for future research | 第80-83页 |
| ·Limitations of the study | 第80-81页 |
| ·Directions for future research | 第81-83页 |
| Acknowledgements | 第83-84页 |
| Bibliography | 第84-87页 |
| Appendix 1 | 第87-93页 |
| Appendix 2 | 第93-97页 |
| Appendix 3 | 第97-108页 |
| Article Published | 第108页 |
