| Acknowledgements | 第1-6页 |
| Abstract in Chinese | 第6-8页 |
| Abstract in English | 第8-10页 |
| Chapter 1 Introduction | 第10-15页 |
| ·The general background of the study | 第10-12页 |
| ·The significance of the present study | 第12-13页 |
| ·The research questions | 第13-15页 |
| Chapter 2 Literature Review | 第15-28页 |
| ·Tasks in writing | 第15页 |
| ·Task classifications in writing | 第15-22页 |
| ·Task typology | 第15-16页 |
| ·Task features | 第16-19页 |
| ·Task types and language production | 第19-20页 |
| ·Task features and language production | 第20-22页 |
| ·The analysis of writing production | 第22-28页 |
| ·The effects of task types on writing production | 第23-25页 |
| ·The effects of task features on writing production | 第25-28页 |
| Chapter 3 The design and the project | 第28-33页 |
| ·The subjects | 第28页 |
| ·The instruments | 第28-30页 |
| ·The procedures of experiment | 第30页 |
| ·The measures of writing production | 第30-33页 |
| Chapter 4 Results and Discussion | 第33-46页 |
| ·The influences of task types on writing production | 第33-42页 |
| ·The accuracy of writing production across tasks | 第33-36页 |
| ·The complexity of writing production across tasks | 第36-40页 |
| ·The fluency of writing production across tasks | 第40-42页 |
| ·The effects of task complexity on writing production | 第42-44页 |
| ·The relationship between task difficulty and writing production | 第44-46页 |
| Chapter 5 Conclusions and Implications | 第46-52页 |
| ·The conclusion of the present study | 第46-48页 |
| ·The implications of the present study | 第48-51页 |
| ·Implications for syllabus design | 第48-49页 |
| ·Implications for task-based writing instruction | 第49-50页 |
| ·Implications for evaluating task-based performance | 第50页 |
| ·Implications of the affect in the task performance | 第50-51页 |
| ·The limitations of present study and suggestions for further study | 第51-52页 |
| Bibliography | 第52-55页 |
| Appendix I | 第55-57页 |
| Appendix II | 第57-59页 |
