| Acknowledgements | 第5-7页 |
| Abstract in Chinese | 第7-9页 |
| Abstract in English | 第9-12页 |
| Abbreviations | 第15-19页 |
| Chapter 1 Introduction | 第19-24页 |
| 1.1 Research Background | 第19-21页 |
| 1.2 Objectives and Significance of the Study | 第21-22页 |
| 1.3 Organization of the Study | 第22-24页 |
| Chapter 2 Literature Review | 第24-41页 |
| 2.1 Previous Research on Lexical Chunks | 第24-35页 |
| 2.1.1 Definition of Lexical Chunkc | 第24-26页 |
| 2.1.2 Classification of Lexical Chunks | 第26-31页 |
| 2.1.3 Foreign Research on Lexical Chunks | 第31-33页 |
| 2.1.4 Domestic Research on Lexical Chunks | 第33-35页 |
| 2.2 Previous Research on Cognitive Grammar | 第35-39页 |
| 2.2.1 Foreign Research on Cognitive Grammar | 第35-36页 |
| 2.2.2 Domestic Research on Cognitive Grammar | 第36-39页 |
| 2.3 Summary | 第39-41页 |
| Chapter 3 Theoretical Framework | 第41-50页 |
| 3.1 Cognitive Grammar | 第41-43页 |
| 3.2 Construal | 第43-49页 |
| 3.2.1 Specificity | 第44页 |
| 3.2.2 Scope | 第44-46页 |
| 3.2.3 Background | 第46页 |
| 3.2.4 Perspective | 第46-47页 |
| 3.2.5 Prominence | 第47-49页 |
| 3.3 Summary | 第49-50页 |
| Chapter 4 Methodology | 第50-60页 |
| 4.1 Research Questions | 第50页 |
| 4.2 Methods of the Study | 第50-51页 |
| 4.3 Research Instruments | 第51-54页 |
| 4.3.1 Corpora | 第52-53页 |
| 4.3.2 Software | 第53-54页 |
| 4.4 The Identification and Classification of Four-word Chunks | 第54-57页 |
| 4.5 Research Procedures | 第57-59页 |
| 4.6 Summary | 第59-60页 |
| Chapter 5 Results and Discussions | 第60-85页 |
| 5.1 Overall Distributions of Four-word Chunks in the Spoken and Written Corpora.. 425.2 Structural and Functional Distribution Features of Four-word Chunks in ChineseEnglish Majors' Spoken and Written Language | 第60-63页 |
| 5.2 Structural and Functional Distribution Features of Four-wordChunks in Chinese English Majors9 Spoken and Written Language | 第63-73页 |
| 5.2.1 Comparisons and Discussions on the Structural Distributions of Four-wordChunks | 第63-68页 |
| 5.2.2 Comparisons and Discussions on the Functional Distribution of Four-wordChunks | 第68-73页 |
| 5.3 The Distinction of Four-word Chunks between the Spoken and WrittenLanguage | 第73-84页 |
| 5.3.1 Distribution Features of Four-word Chunks Used by Native Speakers | 第73-76页 |
| 5.3.2 Comparisons in the Distributions of Four-word Chunks between EnglishMajors and Native Speakers | 第76-79页 |
| 5.3.3 Reason Analysis and Implications | 第79-84页 |
| 5.4 Summary | 第84-85页 |
| Chapter 6 Conclusion | 第85-90页 |
| 6.1 Major Findings | 第85-87页 |
| 6.2 Significance and Implications | 第87-88页 |
| 6.3 Limitations and Suggestions for Further Studies | 第88-90页 |
| Bibliography | 第90-95页 |
| Papers Published During the Study for M. A. Degree | 第95页 |
