| Abstract | 第1-8页 |
| 摘要 | 第8-9页 |
| Acknowledgements | 第9-12页 |
| Chapter 1 Introduction | 第12-19页 |
| ·Background of the Research | 第12-16页 |
| ·Theoretical Background | 第13-14页 |
| ·Present Educational Background | 第14-16页 |
| ·Significance of the Research | 第16-17页 |
| ·Overview of the Thesis | 第17-19页 |
| Chapter 2 Literature Review | 第19-34页 |
| ·Definition of Lexical Chunks | 第19-20页 |
| ·Lewis' Classification of Lexical Chunks | 第20-25页 |
| ·Functions of Lexical Chunks | 第25-30页 |
| ·Minimizing Language Processing | 第25-27页 |
| ·Stimulating Motivation | 第27-28页 |
| ·Improving the Fluency and Accuracy of Language Production | 第28-30页 |
| ·Previous Studies of Lexical Chunks | 第30-33页 |
| ·Studies Abroad | 第31-32页 |
| ·Studies at Home | 第32-33页 |
| ·Summary | 第33-34页 |
| Chapter 3 Experiment Design | 第34-56页 |
| ·Aim and Hypothesis | 第34页 |
| ·Subjects of the Experiment | 第34-35页 |
| ·Instruments of the Experiment | 第35-36页 |
| ·Experiment procedure | 第36-52页 |
| ·Pre-writing stage | 第36-46页 |
| ·While-writing Stage | 第46-51页 |
| ·Post-writing stage | 第51-52页 |
| ·Data Collection | 第52-56页 |
| ·Data Collection by Questionnaire | 第52-53页 |
| ·Data Collection by Pretest | 第53页 |
| ·Data Collection by Midtest | 第53-54页 |
| ·Data Collection by Posttest | 第54-56页 |
| Chapter 4 Data Analysis and Discussion | 第56-67页 |
| ·Quantitative Analysis and Discussions | 第56-62页 |
| ·Statistical Results of the Composition Scores and Discussion | 第56-58页 |
| ·Statistical Results of the Number of Lexical Chunks and Discussion | 第58-62页 |
| ·Qualitative Analysis and Discussions | 第62-66页 |
| ·Summary | 第66-67页 |
| Chapter 5 Conclusion | 第67-71页 |
| ·Main Findings | 第67-68页 |
| ·Pedagogical Implications | 第68-69页 |
| ·Limitations and Further research suggestions | 第69-71页 |
| References | 第71-75页 |
| Appendix Ⅰ Questionnaire | 第75-77页 |
| Appendix Ⅱ Writing Tasks in Pretest, Midtest and Posttest | 第77-79页 |
| Appendix Ⅲ A Students'Writing Samples Comparison before and after theExperiment | 第79-81页 |
| Appendix Ⅳ Criterion of Grading for College Entrance Examination | 第81-82页 |
| Appendix Ⅴ Raw Scores of 80 students'Compositions in the Pretest, Midtest andPosttest | 第82-84页 |
| Appendix VI Raw Data of the Number of Lexical Chunks in 80 students'Compositions in the Pretest, Midtest and Posttest | 第84-85页 |
