| Abstract | 第1-6页 |
| 摘要 | 第6-10页 |
| Chapter 1 Introduction | 第10-14页 |
| ·The general background of the study | 第10-11页 |
| ·The significance of the study | 第11-12页 |
| ·The research questions | 第12-14页 |
| Chapter 2 Literature Review | 第14-34页 |
| ·Tasks in writing | 第14-19页 |
| ·Definition of task | 第14-15页 |
| ·Task typology | 第15-16页 |
| ·Task complexity | 第16-19页 |
| ·The effect of task typology, task complexity on language production | 第19-25页 |
| ·The effect of task typology on language production | 第20页 |
| ·The effect of task complexity on language production | 第20-22页 |
| ·The effect of task types, task complexity on language production in China | 第22-23页 |
| ·The effect of task typology, task complexity on writing production | 第23-25页 |
| ·The verb patterns | 第25-34页 |
| ·The definition of verb patterns | 第25-26页 |
| ·The classification of verb patterns | 第26-30页 |
| Table 2.1 Classification of verb patterns by Frsncis et al (1996) | 第28-29页 |
| Table 2.2 Classification of verb patterns by Heng Renquan (2009) | 第29-30页 |
| ·The measurement of verb patterns | 第30-34页 |
| Chapter 3 Research Design and Methodology | 第34-38页 |
| ·The participants | 第34页 |
| ·The instrument and procedures of experiment | 第34-36页 |
| ·The instrument of the study | 第34-36页 |
| Table 3.2.1 The complexity of three tasks in writing | 第36页 |
| ·The procedure of the study | 第36页 |
| ·Measurements of verb patterns in task-based language production | 第36-38页 |
| Chapter 4 Results and Discussion | 第38-51页 |
| ·The effect of task types on verb patterns | 第38-39页 |
| ·The effect of task complexity on verb patterns | 第39-43页 |
| ·The effect of task complexity on complexity of verb patterns | 第39-41页 |
| Table 4.2 Descriptive statistic of complexity of verb patterns among three tasks | 第39-40页 |
| Table 4.3 ANOVA for complexity of verb patterns among three tasks | 第40页 |
| Table 4.4 Multiple Comparisons for complexity of verb patterns among three tasks | 第40-41页 |
| ·The effect of task complexity on accuracy of verb patterns | 第41-43页 |
| Table 4.5 Descriptive statistic of accuracy of verb patterns among three tasks | 第41-42页 |
| Table 4.6 ANOVA for accuracy of verb patterns among three tasks | 第42页 |
| Table 4.7 Multiple Comparisons for accuracy of verb patterns among three tasks | 第42-43页 |
| ·The effect of time pressure on verb patterns | 第43-44页 |
| ·The effect of time pressure on complexity of verb patterns | 第43页 |
| ·The effect of time pressure on accuracy of verb patterns | 第43-44页 |
| Table 4.9 Independent Sample T-Test of Group 1 and Group2 on accuracy of verb patterns | 第44页 |
| ·The co-relationship between complexity of verb patterns and accuracy of verb patterns | 第44-45页 |
| ·Discussion | 第45-51页 |
| ·Discussion on effect of task types on complexity and accuracy of verb patterns | 第45-46页 |
| ·Discussion on effect of task complexity on complexity of verb patterns | 第46-47页 |
| ·Discussion on effect of task complexity on accuracy of verb patterns | 第47-48页 |
| ·Discussion on effect of time pressure on verb patterns | 第48-50页 |
| ·Discussion on relationship between complexity and accuracy of verb patterns | 第50-51页 |
| Chapter 5 Conclusions, Implications and Limitations | 第51-58页 |
| ·Conclusions drawn from the present study | 第51-53页 |
| ·Implications | 第53-56页 |
| ·Implications for designing task in teaching activities | 第53-54页 |
| ·Implications for task-based writing instruction | 第54-56页 |
| ·Implications for evaluating task-based writing | 第56页 |
| ·Limitations | 第56-58页 |
| References | 第58-61页 |
| Appendix (1) The three tasks | 第61-62页 |
| Appendix (Ⅱ) The students' performance variables | 第62-64页 |
| Acknowledgement | 第64页 |
