| Acknowledgements | 第10-11页 |
| Abstract | 第11-12页 |
| 摘要 | 第13-15页 |
| Chapter 1 Introduction | 第15-20页 |
| 1.1. Research Background | 第15-16页 |
| 1.2. Research Aims | 第16-17页 |
| 1.3. Research Significance | 第17-18页 |
| 1.4. Organization of the Thesis | 第18-20页 |
| Chapter 2 Literature Review | 第20-34页 |
| 2.1. The Study of Word Combination | 第20-21页 |
| 2.2. The Definition and Features of Lexical Bundles | 第21-22页 |
| 2.3. Classifications of Lexical Bundles | 第22-29页 |
| 2.3.1. The Structural Classification of Lexical Bundles | 第22-25页 |
| 2.3.2. The Functional Classification of Lexical Bundles | 第25-29页 |
| 2.4. Studies on Lexical Bundles Abroad | 第29-31页 |
| 2.5. Studies on Lexical Bundles at Home | 第31-34页 |
| Chapter 3 Research Design | 第34-40页 |
| 3.1. Corpora Used in the Study | 第34-35页 |
| 3.2. Research Questions | 第35页 |
| 3.3. Methods to Generate Four-word Lexical Bundles | 第35-37页 |
| 3.3.1. Two General Approaches | 第35-36页 |
| 3.3.2. Identification of Lexical Bundles | 第36-37页 |
| 3.4. Research Instruments | 第37-38页 |
| 3.5. Research Procedures | 第38-40页 |
| Chapter 4 Results and Discussions | 第40-62页 |
| 4.1. Four-word Lexical Bundles in the Two Corpora | 第40-43页 |
| 4.2. Structural Analysis of Four-word Lexical Bundles in the Two Corpora | 第43-52页 |
| 4.2.1. Structural Analysis of Four-word Lexical Bundles in GXUN | 第43-45页 |
| 4.2.2. Structural Analysis of Four-word Lexical Bundles in Brown Family | 第45-46页 |
| 4.2.3. Structural Comparison of Four-word Lexical Bundles between theTwo Corpora | 第46-52页 |
| 4.3. Functional Analysis of Four-word Lexical Bundles in the Two Corpora | 第52-62页 |
| 4.3.1. Functional Analysis of Four-word Lexical Bundles in GXUN | 第52-53页 |
| 4.3.2. Functional Analysis of Four-word Lexical Bundles in Brown Family | 第53-54页 |
| 4.3.3. Functional Analysis of Four-word Lexical Bundles between the TwoCorpora | 第54-62页 |
| Chapter 5 Conclusions | 第62-67页 |
| 5.1. Findings of the Present Study | 第62-64页 |
| 5.2. Pedagogical Implications | 第64-65页 |
| 5.2.1. Implications for Chinese Postgraduates’Academic Writing | 第64-65页 |
| 5.2.2. Implications for Teaching and Learning of Lexical Bundles | 第65页 |
| 5.3. Limitations and Suggestions | 第65-67页 |
| References | 第67-73页 |
| Appendix 1 GXUN four-word lexical bundles | 第73-75页 |
| Appendix 2 Brown Family four-word lexical bundles | 第75-77页 |
| Appendix 3 Structural category of GXUN | 第77-79页 |
| Appendix 4 Structural category of Brown Family | 第79-80页 |
| Appendix 5 Functional category of GXUN | 第80-82页 |
| Appendix 6 Functional category of Brown Family | 第82-83页 |
| Publications during the Postgraduate Program | 第83页 |
