| Acknowledgments | 第5-6页 |
| 摘要 | 第6-7页 |
| Abstract | 第7-8页 |
| Chapter 1 Introduction | 第11-15页 |
| 1.1 Background | 第12-13页 |
| 1.2 Purpose and Significance | 第13-14页 |
| 1.3 Outline of the Thesis | 第14-15页 |
| Chapter 2 Literature Review | 第15-31页 |
| 2.1 Definition of Lexical Chunks | 第15-18页 |
| 2.1.1 The Difference between Single Words and Lexical Chunks | 第17-18页 |
| 2.2 Classifications of Lexical Chunks | 第18-23页 |
| 2.3 Characteristics of Lexical Chunks | 第23-24页 |
| 2.4 Functions of Lexical Chunks | 第24-25页 |
| 2.5 Lexical Approach | 第25-27页 |
| 2.6 Research Abroad | 第27-28页 |
| 2.7 Research in China | 第28-31页 |
| Chapter 3 Methodology | 第31-38页 |
| 3.1 Subjects | 第31-32页 |
| 3.2 Research Questions | 第32页 |
| 3.3 Instruments | 第32-38页 |
| 3.3.1 A Qualitative Research: Questionnaires | 第33页 |
| 3.3.2 A Quantitative Research | 第33-34页 |
| 3.3.3 Assignments of Pre-test and Post-test Composition | 第34-35页 |
| 3.3.4 The Criteria of the Composition | 第35-36页 |
| 3.3.5 Teaching Procedures in EG and CG | 第36-38页 |
| Chapter 4 Data Analysis and Results | 第38-51页 |
| 4.1. Number and Frequency of Lexical Chunks Used in Writing | 第38-40页 |
| 4.2 Data Analysis of Questionnaires | 第40-42页 |
| 4.3 Results and Analysis of Pre-test and Post-test Writing | 第42-47页 |
| 4.3.1 Results and Analysis of Pre-test Writing | 第42-44页 |
| 4.3.2 Results and Analysis of Post-test Writing | 第44-47页 |
| 4.4 Correlation Analysis of Lexical Chunks and Composition Scores | 第47-49页 |
| 4.5 Results and Data Analysis of the Vocabulary Test | 第49-51页 |
| Chapter 5 Pedagogical Implications | 第51-57页 |
| 5.1 Improving Effective Teaching Methods in Writing | 第51-54页 |
| 5.2 Developing Some Productive Strategies of Teaching Lexical Chunks | 第54-57页 |
| 5.2.1 Creating Active Situations of Acquiring Lexical Chunks | 第54-55页 |
| 5.2.2 Introducing Different Types of Lexical Chunks in Writing | 第55-57页 |
| Chapter 6 Conclusion | 第57-60页 |
| 6.1 Conclusion | 第57-58页 |
| 6.2 Limitations of This Study and Suggestions for Further Studies | 第58-60页 |
| Bibliography | 第60-65页 |
| Appendix I | 第65-67页 |
| Appendix II | 第67-70页 |
| Appendix III | 第70页 |
