| Acknowledgements | 第4-5页 |
| 摘要 | 第5-6页 |
| ABSTRACT | 第6-7页 |
| List of Abbreviations | 第11-12页 |
| Chapter One Introduction | 第12-18页 |
| 1.1 Research Background | 第12-13页 |
| 1.2 Research Objectives | 第13-14页 |
| 1.3 Research Significance | 第14-15页 |
| 1.4 Organization of the Thesis | 第15-18页 |
| Chapter Two Literature Review | 第18-32页 |
| 2.1 Previous Studies on Collocations | 第18-20页 |
| 2.2 Corpus-based Research on Recurrent Word Combinations | 第20-21页 |
| 2.3 Previous Studies of Lexical Chunks | 第21-32页 |
| 2.3.1 The Definition of Lexical Chunks | 第21-24页 |
| 2.3.2 The Main Features of Lexical Chunks | 第24页 |
| 2.3.3 The Classifications of Lexical Chunks | 第24-32页 |
| Chapter Three Research Design | 第32-40页 |
| 3.1 Research Questions | 第32页 |
| 3.2 The Self-built Corpora | 第32-35页 |
| 3.3 Research Framework | 第35-37页 |
| 3.3.1 The Identification of Lexical Chunks | 第35-36页 |
| 3.3.2 Taxonomy for Classifying Lexical Chunks | 第36-37页 |
| 3.4 Research Instruments | 第37-38页 |
| 3.5 Research Procedures | 第38-40页 |
| Chapter Four Results and Discussion on Lexical Chunks in Two Corpora | 第40-66页 |
| 4.1 The Distribution of Lexical Chunks in Two Corpora | 第40-46页 |
| 4.2 Structural Classification of 4-word Lexical Chunks in CPTC and NPTC | 第46-56页 |
| 4.2.1 Structural Characteristics of 4-word Lexical Chunks in CPTC | 第47-51页 |
| 4.2.2 Structural Characteristics of 4-word Lexical Chunks in NPTC | 第51-54页 |
| 4.2.3 Comparison of the Structural Distribution between Two Corpora | 第54-56页 |
| 4.3 Functional Classification of 4-word Lexical Chunks in CPTC and NPTC | 第56-66页 |
| 4.3.1 Functional Characteristics of 4-word Lexical Chunks in CPTC | 第57-60页 |
| 4.3.2 Functional Characteristics of 4-word Lexical Chunks in NPTC | 第60-63页 |
| 4.3.3 Comparison of the Functional Distribution between Two Corpora | 第63-66页 |
| Chapter Five Results and Discussion on Lexical Chunks in Introduction | 第66-74页 |
| 5.1 Structural Features of 4-word Lexical Chunks in Introduction | 第66-69页 |
| 5.2 Functional Features of 4-word Lexical Chunks in Introduction | 第69-74页 |
| Chapter Six Conclusion | 第74-78页 |
| 6.1 Major Findings of the Research | 第74-75页 |
| 6.2 Pedagogical Implications | 第75-76页 |
| 6.3 Limitations and Suggestions | 第76-78页 |
| References | 第78-82页 |
| Appendix Ⅰ Structural Classifications of Lexical Chunks | 第82-86页 |
| Appendix Ⅱ Functional Classifications of Lexical Chunks | 第86-90页 |
| Appendix Ⅲ Structural Classifications of Lexical Chunks in Introduction | 第90-94页 |
| Appendix Ⅴ Functional Classifications of Lexical Chunks in Introduction | 第94-97页 |
| 攻读学位期间发表的学术论文目录 | 第97-98页 |
