| 中文摘要 | 第4-5页 |
| Abstract | 第5-6页 |
| Chapter One Introduction | 第8-14页 |
| 1.1 Research Background | 第8-10页 |
| 1.2 Significance of the Study and Purpose of the Study | 第10-12页 |
| 1.2.1 Academic Value of the Study | 第10-11页 |
| 1.2.2 Practical Significance of the Study | 第11-12页 |
| 1.2.3 Purpose of the Study | 第12页 |
| 1.3 Thesis Structure | 第12-14页 |
| Chapter Two Literature Review | 第14-26页 |
| 2.1 Definitions of Lexical Chunks | 第14-16页 |
| 2.2 Classification of Lexical Chunks | 第16-21页 |
| 2.3 Previous Studies on Lexical Chunks | 第21-26页 |
| 2.3.1 Theoretical Analysis of Lexical Chunks | 第22页 |
| 2.3.2 Empirical Research on Lexical Chunks | 第22-26页 |
| Chapter Three Methodology | 第26-29页 |
| 3.1 Research Questions | 第26页 |
| 3.2 Participants | 第26-27页 |
| 3.3 Data Collection and Analysis | 第27-29页 |
| Chapter Four Results | 第29-46页 |
| 4.1 Quantitative Analysis of Lexical Chunks in the Writing | 第29-33页 |
| 4.1.1 Frequency of Lexical Chunks in High-score and Low-score Groups | 第29-30页 |
| 4.1.2 Varieties of Lexical Chunks in High-score and Low-score Groups | 第30-32页 |
| 4.1.3 Relationship between Lexical Chunks and Writing Scores | 第32-33页 |
| 4.2 Qualitative Analysis of The Writing | 第33-39页 |
| 4.2.1 Commonly Used Lexical Chunks | 第33-36页 |
| 4.2.2 Common Errors in Lexical Chunks | 第36-38页 |
| 4.2.3 Comparison of a High-score and a Low-score Essays | 第38-39页 |
| 4.3 Questionnaire Results | 第39-46页 |
| Chapter Five Discussion | 第46-56页 |
| 5.1 Differences of Lexical Chunks in High-score and Low-score Groups | 第46-48页 |
| 5.2 Features of Lexical Chunks in High School Students' Writing | 第48-53页 |
| 5.3 Importance of Lexical Chunks in Writing | 第53-56页 |
| Chapter Six Conclusion | 第56-60页 |
| 6.1 Major Findings | 第56-57页 |
| 6.2 Pedagogical Implications | 第57-59页 |
| 6.3 Limitations and Suggestions for Further Research | 第59-60页 |
| Bibliography | 第60-63页 |
| Acknowledgements | 第63-64页 |
| Appendix | 第64-69页 |
| 攻读硕士学位期间科研成果 | 第69页 |
