| Acknowledgements | 第1-5页 |
| 摘要 | 第5-6页 |
| Abstract | 第6-9页 |
| Chapter One Introduction | 第9-12页 |
| ·Need for the Study | 第9-10页 |
| ·Methodology and Data Selection | 第10-11页 |
| ·Thesis Structure | 第11-12页 |
| Chapter Two Literature Review | 第12-20页 |
| ·Vagueness from the Philosophical Perspective | 第12-14页 |
| ·Vagueness from Psychological Perspective | 第14-15页 |
| ·Vagueness from Linguistic Perspective | 第15-20页 |
| Chapter Three Theoretical Frameworks | 第20-26页 |
| ·Pragmatic Ambivalence | 第20-23页 |
| ·Definition of Pragmatic Ambivalence | 第20-21页 |
| ·The Classification of the Major Types of Pragmatic Ambivalence | 第21-23页 |
| ·Some Concepts Related to Pragmatic Ambivalence | 第23-26页 |
| ·Speech Act Theory and Indirect Speech Act | 第23-25页 |
| ·Major Differences between Pragmatic Ambivalence and Indirect Speech Act | 第25-26页 |
| Chapter Four the Analysis of Verbal Humor in Friends from the Perspective of Pragmatic Ambivalence | 第26-54页 |
| ·Humor | 第26-30页 |
| ·Definitions and Classifications of Humor | 第26-27页 |
| ·Humor Theories | 第27-30页 |
| ·Three Classical Theories of Humor | 第28-29页 |
| ·SSTH and GTVH | 第29-30页 |
| ·Pragmatic Ambivalence and Humor | 第30-31页 |
| ·Analysis of Verbal Humor in Friends from the Perspective of Pragmatic Ambivalence | 第31-53页 |
| ·Pragmatic Multivalence and Humor | 第32-38页 |
| ·Pragmatic Bivalence/Plurivalence and Humor | 第38-43页 |
| ·Conditional Bivalent Illocutionary Act and Humor | 第43-48页 |
| ·Discoursal Ambivalence and Humor | 第48-53页 |
| ·Summary | 第53-54页 |
| Chapter Five Conclusion | 第54-57页 |
| ·Major Findings of the Research | 第54页 |
| ·Significance of the Research | 第54-55页 |
| ·Limitations and Suggestions for Further Studies | 第55-57页 |
| Bibliography | 第57-61页 |
