| 摘要 | 第1-5页 |
| Abstract | 第5-7页 |
| List of tables | 第7-8页 |
| Contents | 第8-10页 |
| Chapter One Introduction | 第10-16页 |
| ·Background of the research | 第10页 |
| ·Purpose of the study | 第10-11页 |
| ·Significance of the study | 第11-12页 |
| ·Research methodology | 第12-13页 |
| ·Research question | 第12页 |
| ·Corpus design | 第12-13页 |
| ·Analytical instrument | 第13页 |
| ·Main process of the study | 第13页 |
| ·Organization of the thesis | 第13-16页 |
| Chapter Two Literature review | 第16-30页 |
| ·Definition and development of hedges | 第16-18页 |
| ·Classifications of hedges | 第18-22页 |
| ·Pragmatic classification of hedges | 第18-22页 |
| ·Classification of hedges in the present study | 第22页 |
| ·Specific features of hedges | 第22-24页 |
| ·Cancellability | 第22-23页 |
| ·Markedness | 第23页 |
| ·Indefiniteness | 第23页 |
| ·Indirectness | 第23-24页 |
| ·Previous researches on hedges | 第24-30页 |
| ·Researches on hedges abroad | 第24-27页 |
| ·Researches on hedges at home | 第27-30页 |
| Chapter Three Theoretical framework | 第30-36页 |
| ·The Adaptation Theory | 第30-34页 |
| ·Philosophical origin | 第30-31页 |
| ·Making a choice | 第31-32页 |
| ·Three properties of language | 第32-33页 |
| ·Four angles of investigation | 第33-34页 |
| ·A study of hedges based on Adaptation Theory | 第34-36页 |
| Chapter Four Analysis and statistical results | 第36-44页 |
| ·Distribution of hedges in English broadcasting news | 第36-38页 |
| ·Statistical results of top 10 hedges of each type | 第38-44页 |
| ·Adaptors in English broadcasting news | 第38-39页 |
| ·Rounders in English broadcasting news | 第39-40页 |
| ·Plausibility shields in English broadcasting news | 第40-41页 |
| ·Attribution shields in English broadcasting news | 第41-44页 |
| Chapter Five Pragmatic analysis of hedges in English broadcasting news | 第44-60页 |
| ·The reasons for the existence of hedges in English broadcasting news | 第44-51页 |
| ·Adaptation to the physical world | 第45-47页 |
| ·Adaptation to the Mental World | 第47-49页 |
| ·Adaptation to the social world | 第49-51页 |
| ·Pragmatic functions of hedges in English broadcasting news | 第51-60页 |
| ·Seeking accuracy | 第52-53页 |
| ·Avoiding absoluteness | 第53-55页 |
| ·Protecting reporters and the providers of the news | 第55-57页 |
| ·Predicting the trend of the news euphemistically | 第57-60页 |
| Chapter Six Conclusion | 第60-64页 |
| ·Major findings | 第60-61页 |
| ·Limitations of the Thesis | 第61页 |
| ·Suggestions of Further Study | 第61-64页 |
| References | 第64-67页 |
| Acknowledgements | 第67-69页 |
| 攻读硕士学位期间的研究成果 | 第69页 |
