| Abstract | 第3-4页 |
| 摘要 | 第5-7页 |
| List of Tables | 第7-8页 |
| List of Abbreviations | 第8-9页 |
| Contents | 第9-11页 |
| Chapter 1 Introduction | 第11-16页 |
| 1.1 Research Background | 第11-13页 |
| 1.2 Research Significance | 第13页 |
| 1.3 The Purpose of the Thesis | 第13-14页 |
| 1.4 Overview of the Thesis | 第14-16页 |
| Chapter 2 Literature Review | 第16-29页 |
| 2.1 The Definition of Lexical Chunks | 第16-19页 |
| 2.2 The Classification of Lexical Chunks | 第19-21页 |
| 2.3 Functions of Lexical Chunks | 第21-23页 |
| 2.4 Lexical Chunks in EFL Writing | 第23-26页 |
| 2.4.1 Research abroad | 第23-24页 |
| 2.4.2 Research at home | 第24-26页 |
| 2.5 Writing in Different Situations | 第26-29页 |
| 2.5.1 Timed and Untimed Writing | 第26-27页 |
| 2.5.2 In-class and Out-of-class Writing | 第27页 |
| 2.5.3 Incidental Vocabulary Acquisition and English Writing | 第27-29页 |
| Chapter 3 Methodology | 第29-34页 |
| 3.1 Research Questions | 第29页 |
| 3.2 Research Subjects | 第29-30页 |
| 3.3 Data Types | 第30-31页 |
| 3.4 Data Collecting Procedure | 第31页 |
| 3.5 Data Analysis | 第31-34页 |
| Chapter 4 Result and Discussion | 第34-54页 |
| 4.1 Reliability Test | 第34-36页 |
| 4.2 General Descriptions of Compositions | 第36-40页 |
| 4.2.1 Data Description | 第36-38页 |
| 4.2.2 Discussion for the General Comparison between Untimed Writing and Timed Writing | 第38-40页 |
| 4.3 The Relationship between Lexical Chunk Use and Untimed Writing as well as Timed Writing | 第40-46页 |
| 4.3.1 Data Description and Discussion for Lexical Chunk Use | 第40-43页 |
| 4.3.2 Data Description and Discussion for the Correlation between Lexical Chunks and Composition Scores | 第43-46页 |
| 4.4 Advanced Language Learners and Elementary Language Learners in Using Lexical Chunks | 第46-50页 |
| 4.4.1 Statistic Description | 第46-49页 |
| 4.4.2 Discussion | 第49-50页 |
| 4.5 Analysis of Questionnaires | 第50-54页 |
| Chapter 5 Conclusion | 第54-64页 |
| 5.1 Findings | 第54-55页 |
| 5.2 Pedagogical Implications | 第55-62页 |
| 5.2.1 Arousing Students’ Awareness of Lexical Chunks | 第55-57页 |
| 5.2.2 Teaching Lexical Chunks | 第57-58页 |
| 5.2.3 Paying Great Attention to Output | 第58-59页 |
| 5.2.4 Making Full Use of Extracurricular Teaching | 第59-61页 |
| 5.2.5 Making Full Use of Various Dictionaries | 第61-62页 |
| 5.3 Limitations of the Present Research and Suggestions for Further Study | 第62-64页 |
| References | 第64-69页 |
| Appendix | 第69-70页 |
| Acknowledgement | 第70-71页 |
| Publications | 第71页 |
