| ACKNOWLEDGEMENTS | 第8-9页 |
| 摘要 | 第9-10页 |
| ABSTRACT | 第10页 |
| CHAPTER Ⅰ INTRODUCTION | 第13-15页 |
| 1.1 The Background of the Study | 第13页 |
| 1.2 The Significance of the Study | 第13-14页 |
| 1.3 The Structure of the Thesis | 第14-15页 |
| CHAPTER Ⅱ LITERATURE REVIEW | 第15-20页 |
| 2.1 An Overview of Business Letters | 第15-18页 |
| 2.1.1 Business Letters and Their Functions | 第15-16页 |
| 2.1.2 Classification of Business Letters | 第16页 |
| 2.1.3 Criteria of a Good and Effective Business Letter | 第16-18页 |
| 2.2 Previous Studies about Business Letters and Their Inadequacy | 第18-20页 |
| CHAPTER Ⅲ THEORETICAL FRAMEWORK | 第20-31页 |
| 3.1 General Description of Adaptation Theory | 第20-29页 |
| 3.1.1 Making Choices | 第21页 |
| 3.1.2 Three Properties of Language—Variability, Negotiability and Adaptability | 第21-23页 |
| 3.1.3 Four Angles of Investigation---Context, Structure, Dynamics and Salience | 第23-29页 |
| 3.2 Conceptual Framework for Analyzing Business Letters | 第29-31页 |
| CHAPTER Ⅳ LINGUISTIC AND CONTEXTUAL ANALYSIS OF BUSINESS LETTERS | 第31-46页 |
| 4.1 Linguistic Analysis | 第31-40页 |
| 4.1.1 Lexical Analysis | 第32-34页 |
| 4.1.2 Syntactical Analysis | 第34-37页 |
| 4.1.3 Textual Analysis | 第37-40页 |
| 4.2 Contextual Analysis | 第40-46页 |
| 4.2.1 We-Strategy Used in Business Letters | 第40-41页 |
| 4.2.2 You-Strategy Used in Business Letters | 第41-43页 |
| 4.2.3 Direct and Indirect Organization of Business Letters | 第43-46页 |
| CHAPTER Ⅴ A PRAGMATIC-ADAPTATION ANALYSIS OF BUSINESS LETTERS | 第46-57页 |
| 5.1 Adaptation to the Mental World | 第46-48页 |
| 5.2 Adaptation to the Social World | 第48-50页 |
| 5.3 Adaptation to the Physical World | 第50页 |
| 5.3.1 Adaptation to the Temporal Reference | 第50-51页 |
| 5.3.2 Adaptation to the Physical Reference | 第51-53页 |
| 5.4 Adaptation to Linguistic Channel | 第53-55页 |
| 5.5 Adaptation to the Cognition Mechanism | 第55-57页 |
| CHAPTER Ⅵ CONCLUSION | 第57-59页 |
| 6.1 Implications of the Research | 第57-58页 |
| 6.2 Limitations of the Research and Suggestions for the Future Research | 第58-59页 |
| REFERENCES | 第59-61页 |
