| 英文摘要 | 第1-5页 |
| 摘要 | 第5-9页 |
| Chapter Ⅰ Introduction | 第9-13页 |
| ·Background of the Study | 第9-10页 |
| ·Significance and Purposes of the Study | 第10-12页 |
| ·Layout of the Thesis | 第12-13页 |
| Chapter Ⅱ Literature Review | 第13-24页 |
| ·English Business Letters | 第13-21页 |
| ·Definitions of English Business Letters | 第14-15页 |
| ·Characteristics of English Business Letters | 第15-17页 |
| ·Essence and Functions of English Business Letters | 第17-19页 |
| ·Classifications of English Business Letters | 第19-21页 |
| ·English Business Letters and Politeness Principle | 第21-22页 |
| ·Previous Researches in this Field | 第22-24页 |
| Chapter Ⅲ Theoretical Foundations | 第24-35页 |
| ·Leech's Politeness Principle | 第24-28页 |
| ·Content of Leech's Politeness Principle | 第25-27页 |
| ·Importance of Applying Politeness Principle | 第27-28页 |
| ·Brown and Levinson's Face Theory | 第28-30页 |
| ·Content of Brown and Levinson's Face Theory | 第29-30页 |
| ·Necessity for Applying Face Theory | 第30页 |
| ·Culture and Politeness | 第30-35页 |
| ·Relationship between Culture and Politeness | 第31-32页 |
| ·Pragmatic Differences of Politeness Principle in Different Cultures | 第32-33页 |
| ·Reasons for Pragmatic Differences in Politeness Principle | 第33-35页 |
| Chapter Ⅳ Methodology | 第35-38页 |
| ·Research Questions | 第35-36页 |
| ·Research Design | 第36-37页 |
| ·Data Collection | 第37-38页 |
| Chapter Ⅴ Results and Discussions | 第38-66页 |
| ·Positive PP and Negative PP Application in English Business Letters | 第38-48页 |
| ·Analysis of Negative PP in English Business Letters | 第39-43页 |
| ·Analysis of Positive PP in English Business Letters | 第43-46页 |
| ·Analysis of Six Maxims in English Business Letters | 第46-48页 |
| ·Pragmatic Analysis of Different Types of English Business Letters | 第48-53页 |
| ·Analysis of PP in Collaborative Letters | 第48-50页 |
| ·Analysis of PP in Competitive Letters | 第50-52页 |
| ·Analysis of PP in Conflictive Letters | 第52-53页 |
| ·Similarities and Differences in Application of Politeness Principle | 第53-66页 |
| ·Chinese Politeness Principles and Typical Examples | 第57-58页 |
| ·German Politeness Principles and Typical Examples | 第58-60页 |
| ·Cultural Vacancy of English Business Letters | 第60-66页 |
| Chapter Ⅵ Conclusions | 第66-69页 |
| ·Major Findings of the Study | 第66-67页 |
| ·Implications of the Study | 第67-68页 |
| ·Limitations of the Study and Suggestions of the Further Study | 第68-69页 |
| APPENDIX:Sample Letters | 第69-74页 |
| REFERENCES | 第74-77页 |
| ACKNOWLEDGEMENTS | 第77-78页 |
