| Acknowledgements | 第1-5页 |
| Abstract | 第5-7页 |
| 摘要 | 第7-10页 |
| Chapter One Introduction | 第10-15页 |
| ·Background of the Study | 第10-11页 |
| ·The Purpose and Significance of the Study | 第11-12页 |
| ·Research Questions | 第12-13页 |
| ·Data Collection and Methodology of the Thesis | 第13页 |
| ·The Structure of the Thesis | 第13-15页 |
| Chapter Two Literature Review | 第15-28页 |
| ·The History and Development of "X-gate" Phenomenon | 第15-17页 |
| ·The Occurrence of "X-gate" phenomenon | 第15-16页 |
| ·The Development of "X-gate" in China | 第16-17页 |
| ·The Present Research on "X-gate" Phenomenon | 第17-20页 |
| ·Previous Studies on the Adaptation Theory | 第20-28页 |
| Chapter Three An Introduction to Verschueren's Adaptation Theory | 第28-43页 |
| ·The Making of Choices | 第29-32页 |
| ·Features of Adaptation:Three Properties | 第32-36页 |
| ·Variability | 第33页 |
| ·Negotiability | 第33-34页 |
| ·Adaptability | 第34-36页 |
| ·Four Angles of Pragmatic Investigation | 第36-43页 |
| ·Contextual Correlates of Adaptability | 第36-38页 |
| ·Structural Objects of Adaptability | 第38-39页 |
| ·Dynamics of Adaptability | 第39-40页 |
| ·Salience of the Adaptation Process | 第40-43页 |
| Chapter Four Analysis of the "X-gate" Social Language Phenomenon from the Perspective of Adaptation Theory | 第43-81页 |
| ·Diachronic Adaptation of "X-gate" Phenomenon | 第45-46页 |
| ·Synchronic Adaptation of "X-gate" Phenomenon | 第46-68页 |
| ·Contextual Correlates of Adaptability | 第58-68页 |
| ·Adaptation to the Physical World | 第59-60页 |
| ·Adaptation to the Social World | 第60-61页 |
| ·Adaptation to the Mental World | 第61-68页 |
| ·Structural O bjects of Adaptability | 第68-72页 |
| ·Dynamics of Adaptability | 第72-77页 |
| ·Dynamics Over Time | 第72-74页 |
| ·Dynamics and Context | 第74-76页 |
| ·Dynamics in Language Structure | 第76-77页 |
| ·Salience of the Adaptation Process | 第77-81页 |
| ·Mind in Society | 第77-78页 |
| ·Degree of Salience | 第78-81页 |
| Chapter Five Conclusion | 第81-84页 |
| References | 第84-88页 |
| Published Works during MA Study | 第88页 |
