| Abstract | 第1-6页 |
| 摘要 | 第6-12页 |
| Chapter One Introduction | 第12-18页 |
| ·Research Background and questions | 第12-13页 |
| ·Significance of the Thesis | 第13-14页 |
| ·Research Methodology | 第14-16页 |
| ·Data Description | 第14-15页 |
| ·Research Methods and Procedure | 第15-16页 |
| ·Organization of the Thesis | 第16-18页 |
| Chapter Two Literature Review | 第18-33页 |
| ·Introduction to Public Speaking | 第18-20页 |
| ·Definition of Public Speaking | 第18页 |
| ·Categories of Public Speech | 第18-19页 |
| ·Features of Public Speech | 第19-20页 |
| ·Introduction to Commencement Speeches | 第20-22页 |
| ·Definition of Commencement Speeches | 第20页 |
| ·Features of Commencement Speeches | 第20-21页 |
| ·Previous Studies from Home and Abroad | 第21-22页 |
| ·General Reviews on Studies of Humor | 第22-33页 |
| ·A General Description of Humor | 第22-24页 |
| ·Three Classical Conventional Theories of Humor | 第24-28页 |
| ·Modern Linguistic Studies on Humor | 第28-31页 |
| ·Previous Linguistic Studies on Verbal Humor from Home and Abroad | 第31-33页 |
| Chapter Three Theoretical Framework of Cooperative Principle, Politeness Principle and Relevance Theory | 第33-47页 |
| ·Cooperative Principle | 第33-36页 |
| ·Four Maxims of Cooperative Principle | 第33-35页 |
| ·Violation of Four Maxims | 第35-36页 |
| ·Politeness Principle | 第36-42页 |
| ·Maxims of Politeness Principle | 第36-37页 |
| ·Leech's Restatement on Politeness Principle | 第37-39页 |
| ·Other Studies on Politeness | 第39-42页 |
| ·Relevance Theory | 第42-47页 |
| ·Cognitive Context | 第42-44页 |
| ·Ostensive-Inferential Mode | 第44-45页 |
| ·Relevance Principle | 第45-47页 |
| Chapter Four A Sample Analysis on Humor in Investigated Speeches from the Perspectives of Cooperative Principle, Politeness Principle and Relevance Theory | 第47-70页 |
| ·Analysis on the Basis of Cooperative Principle | 第47-55页 |
| ·Grice's Cooperative Principle and Verbal Humor | 第47-48页 |
| ·Humorous Effect Achieved by Violating the Maxims of Cooperative Principles | 第48-55页 |
| ·Analysis on the Basis of Politeness Principle | 第55-63页 |
| ·Politeness Principle and Verbal Humor | 第55页 |
| ·Humorous Effect Achieved by Violation of the Maxims | 第55-56页 |
| ·Humorous Effect Achieved by Abiding the Maxims of Politeness Principle | 第56-63页 |
| ·Analysis on the Basis of Relevance Theory | 第63-70页 |
| ·Relevance Theory and Verbal Humor | 第63-64页 |
| ·A Sample Analysis of Humor from the Perspective of Relevance Theory55 | 第64-70页 |
| Chapter Five A Contrastive Analysis on the Three Perspectives | 第70-75页 |
| ·Comparison and Contrast between Cooperative Principle and Politeness Principle | 第70-71页 |
| ·Comparison and Contrast between Cooperative Principle and Relevance Theory | 第71-73页 |
| ·Comparison of Politeness Principle and Relevance Theory | 第73-75页 |
| Chapter Six Conclusion | 第75-79页 |
| ·Summary of the Study | 第75-76页 |
| ·Limitations of the study | 第76-77页 |
| ·Suggestions for further research | 第77-79页 |
| References | 第79-85页 |
| Acknowledgements | 第85-86页 |
| 研究生在学期间主要科研成果 | 第86页 |
