| Acknowledgements | 第5-6页 |
| Abstract | 第6-7页 |
| 摘要 | 第8-14页 |
| Chapter One Introduction | 第14-18页 |
| 1.1 The research background | 第14-15页 |
| 1.2 Research objectives | 第15-16页 |
| 1.3 Research Significance | 第16-17页 |
| 1.4 The layout of the thesis | 第17-18页 |
| Chapter Two Literature Review | 第18-38页 |
| 2.1 Relevant Definitions and Concepts | 第18-25页 |
| 2.1.1 The definition of lexical chunk | 第18-20页 |
| 2.1.2 The Classifications of Lexical Chunk | 第20-23页 |
| 2.1.3 Features of Lexical Chunks | 第23-25页 |
| 2.2 Related researches on English writing teaching | 第25-28页 |
| 2.2.1 Related researches abroad | 第25-28页 |
| 2.2.2 Related researches at home | 第28页 |
| 2.3 Previous studies on lexical chunks | 第28-35页 |
| 2.3.1 Previous researches abroad | 第29-31页 |
| 2.3.2 Previous researches at home | 第31-35页 |
| 2.4 Previous researches on lexical chunks and English writing teaching | 第35-37页 |
| 2.4.1 Previous researches abroad | 第35-36页 |
| 2.4.2 Previous studies at home | 第36-37页 |
| 2.5 Summary | 第37-38页 |
| Chapter three Theoretical Basis of the Research | 第38-44页 |
| 3.1 Theory of memory | 第38-39页 |
| 3.2 The Comprehensible Input Hypothesis | 第39-40页 |
| 3.3 The Output Hypothesis | 第40-42页 |
| 3.4 Summary | 第42-44页 |
| Chapter four Methodology | 第44-62页 |
| 4.1 General description of the experiment | 第44页 |
| 4.2 Research questions | 第44-45页 |
| 4.3 Research subjects | 第45页 |
| 4.4 Research instruments | 第45-47页 |
| 4.4.1 Tests | 第45-46页 |
| 4.4.2 Questionnaire | 第46页 |
| 4.4.3 Interview | 第46-47页 |
| 4.5 Research procedures | 第47-60页 |
| 4.5.1 Before-research preparation | 第48-49页 |
| 4.5.2 Procedure in Experimental Class | 第49-59页 |
| 4.5.3 Procedure in Control class | 第59-60页 |
| 4.6 Data collection | 第60-62页 |
| Chapter Five Results and discussion | 第62-84页 |
| 5.1 Findings and data from the tests | 第62-67页 |
| 5.1.1 The Comparison of the pre-test between CC and EC | 第62-64页 |
| 5.1.2 The Comparison of the post-test between CC and EC | 第64-65页 |
| 5.1.3 The Comparison of the pre-test and post-test of EC | 第65-66页 |
| 5.1.4 The Comparison of the pre-test and post-test of CC | 第66-67页 |
| 5.2 Analysis of lexical chunks used | 第67-71页 |
| 5.2.1 The comparison of the number of lexical chunks between CC and EC in the pretest | 第67-68页 |
| 5.2.2 The comparison of the number of lexical chunks between CC and EC in the post-test | 第68-70页 |
| 5.2.3 The comparison of the number of lexical chunks of EC and CC in the pretest and post-test | 第70-71页 |
| 5.3 Correlation analysis of lexical chunks used and composition scores | 第71-75页 |
| 5.4 Findings from the questionnaire | 第75-77页 |
| 5.5 Analysis and findings of the interview | 第77-79页 |
| 5.6 Discussion | 第79-84页 |
| Chapter Six Conclusion | 第84-88页 |
| 6.1 The major findings of the study | 第84-85页 |
| 6.2 Pedagogical implications | 第85-86页 |
| 6.3 Limitations of the study and suggestions for future study | 第86-88页 |
| References | 第88-92页 |
| Appendix Ⅰ | 第92-94页 |
| Appendix Ⅱ | 第94-96页 |
| Appendix Ⅲ | 第96-97页 |
| Appendix Ⅳ | 第97页 |
