| Abstract | 第1-5页 |
| 摘要 | 第5-9页 |
| Chapter One Introduction | 第9-15页 |
| ·The Research Background | 第9-10页 |
| ·Purpose and Significance of the Study | 第10-12页 |
| ·Data Collection | 第12-13页 |
| ·Structure of the Thesis | 第13-15页 |
| Chapter Two Literature Review | 第15-29页 |
| ·The Previous Studies on Public Service Advertisements | 第15-20页 |
| ·Aesthetics Approach to PSAs | 第15-17页 |
| ·Mass Media Communication Approach to PSA | 第17-19页 |
| ·Linguistic Approach to PSA | 第19-20页 |
| ·The Previous Studies on Critical Discourse Analysis | 第20-26页 |
| ·Pure Theoretical Approach to CDA | 第21-22页 |
| ·Discourse-Historical Approach to CDA | 第22-23页 |
| ·Social-Cognitive Approach to CDA | 第23-25页 |
| ·Socio-Semiotic Approach to CDA | 第25-26页 |
| ·Summary | 第26-29页 |
| Chapter Three Theoretical Framework | 第29-41页 |
| ·Crucial Notions of CDA | 第29-32页 |
| ·The Development of CDA | 第29-31页 |
| ·Ideology and Power | 第31-32页 |
| ·Research Models of CDA | 第32-40页 |
| ·Halliday’s Systemic Functional Grammar | 第33-36页 |
| ·Fairclough’s Three-Dimensional Discourse Analysis Model | 第36-40页 |
| ·Summary | 第40-41页 |
| Chapter Four Critical Analysis on PSA | 第41-62页 |
| ·Ideological Manipulation on the Lexico-grammatical Level | 第41-54页 |
| ·Ideology Manifested by the Different Choice of Modality | 第41-48页 |
| ·Ideology: Ideological Meanings of Personal System | 第48-54页 |
| ·Ideological Manipulation on Clausal Level | 第54-60页 |
| ·Transitivity as Representation of Ideologies | 第54-56页 |
| ·Transitivity System and the Power Relations in PSAs | 第56-60页 |
| ·Summary | 第60-62页 |
| Chapter Five Conclusion | 第62-66页 |
| ·Summary of Major Findings | 第62-64页 |
| ·Limitations of This Thesis | 第64-65页 |
| ·Suggestions for Further Studies | 第65-66页 |
| Bibliography | 第66-69页 |
| Appendix | 第69-84页 |
| Acknowledgements | 第84-85页 |
| Publications | 第85页 |
