| 内容提要 | 第4-5页 |
| Synopsis | 第5-6页 |
| Contents | 第7-9页 |
| Chapter One Introduction | 第9-13页 |
| 1.1 Research Background | 第9-10页 |
| 1.2 Significance of This Study | 第10-11页 |
| 1.3 Organization of This Study | 第11-13页 |
| Chapter Two Literature Review | 第13-27页 |
| 2.1 Review of Vague Language | 第13-20页 |
| 2.1.1 Definition of Vague Language | 第13-15页 |
| 2.1.2 Some Related Terms | 第15-16页 |
| 2.1.3 Previous Research on Vague Language | 第16-20页 |
| 2.2 Review of English Business Correspondence | 第20-23页 |
| 2.2.1 Definition and Classificaiton of English Business Correspondence | 第20-22页 |
| 2.2.2 Principles of English Business Correspondence | 第22-23页 |
| 2.3 Previous Studies on Vague Language in English Business Correspondence | 第23-27页 |
| Chapter Three Theoretical Framework | 第27-32页 |
| 3.1 Adaptation Theory | 第27-28页 |
| 3.2 Cooperative Principle and Politeness Principle | 第28-30页 |
| 3.3 Construction of Theoretical Framework in This Study | 第30-32页 |
| Chapter Four Methodology | 第32-34页 |
| 4.1 Data Collection | 第32-33页 |
| 4.2 Research Questions | 第33页 |
| 4.3 Analytical Methods | 第33-34页 |
| Chapter Five Pragmatic Analysis of Vague Language in English Business Correspondence | 第34-74页 |
| 5.1 Realization Forms and Frequency of Vague Language | 第34-58页 |
| 5.1.1 Distribution of Vagueness in Content and Mood | 第34-40页 |
| 5.1.2 Linguistic and Pragmatic Realization Forms and Frequency of Vague Lanaguage | 第40-58页 |
| 5.2 Situations to Use Vague Language in English Business Correspondence | 第58-60页 |
| 5.2.1 Unable to Get Sufficient Information | 第58-59页 |
| 5.2.2 Unwilling to Give Certain Information | 第59-60页 |
| 5.3 Pragmatic Interpretation of Vague Language in English Business Correspondence | 第60-71页 |
| 5.3.1 Interpretation of Vague Language Based on Adaptation Theory | 第60-68页 |
| 5.3.1.1 Adaptation to Physical World | 第61-63页 |
| 5.3.1.2 Adaptation to Social World | 第63-66页 |
| 5.3.1.3 Adaptation to Mental World | 第66-68页 |
| 5.3.2 Interpretation of Vague Language Based on Cooperative Principle and Politeness Principle | 第68-71页 |
| 5.3.2.1 Violating Cooperative Principle | 第69-70页 |
| 5.3.2.2 Abiding by Politeness Principle | 第70-71页 |
| 5.4 Pragmatic Functions of Vague Language in English Business Correspondence | 第71-74页 |
| 5.4.1 Making Language More Persuasive | 第71-72页 |
| 5.4.2 Making Correspondence More Polite | 第72页 |
| 5.4.3 Increasing Self-protection | 第72-74页 |
| Chapter Six Conclusion | 第74-77页 |
| 6.1 Major Findings | 第74-75页 |
| 6.2 Limitations | 第75-76页 |
| 6.3 Suggestions for Future Study | 第76-77页 |
| References | 第77-80页 |
| Appendix | 第80-81页 |
| 摘要 | 第81-83页 |
| Abstract | 第83-86页 |
| 作者简介 | 第86-87页 |
| Acknowledgements | 第87页 |
