| Abstract | 第1-5页 |
| 摘要 | 第5-9页 |
| Tables and Figures | 第9-11页 |
| 1. Introduction | 第11-13页 |
| ·Background of the Study | 第11-12页 |
| ·Significance and Purpose of the Study | 第12页 |
| ·Organization of the Thesis | 第12页 |
| ·Research Questions | 第12-13页 |
| 2. Literature Review | 第13-20页 |
| ·Theoretical Basis of Functional Approach | 第13-15页 |
| ·Introduction of Systemic Functional Grammar | 第13-15页 |
| ·Introduction of Interpersonal Meta-Function | 第15页 |
| ·Introduction of Modality | 第15-20页 |
| ·The Nature of Modality | 第16页 |
| ·Modality in Systemic-Functional Grammar | 第16-20页 |
| 3. Research Methodology | 第20-25页 |
| ·Data Collection | 第20页 |
| ·Contrasting Levels | 第20-25页 |
| ·Finite Modal Operator | 第20-21页 |
| ·Modal Adjunct | 第21-24页 |
| ·Verbs | 第24页 |
| ·Adjectives | 第24页 |
| ·Nouns | 第24-25页 |
| ·Metaphor of Modality | 第25页 |
| 4. Data Analysis and Discussion | 第25-66页 |
| ·Finite Modal Operators | 第25-40页 |
| ·Finite Modal Operators in English Corpus | 第25-32页 |
| ·Finite Modal operators in Chinese Corpus | 第32-38页 |
| ·Comparison | 第38-40页 |
| ·Modal Adjuncts | 第40-50页 |
| ·Modal adjuncts in English Corpus | 第40-43页 |
| ·Modal Adjunct in Chinese Corpus | 第43-47页 |
| ·Comparison | 第47-50页 |
| ·Modal Verbs | 第50-54页 |
| ·Verbs as Modals in English Corpus | 第51-52页 |
| ·Verbs as Modals in Chinese Corpus | 第52-53页 |
| ·Comparison | 第53-54页 |
| ·Other Lexical Expressions as Modals | 第54-55页 |
| ·Metaphors of Modality | 第55-58页 |
| ·Frequency of Modality | 第58-60页 |
| ·Modality Freqency in English Corpus | 第58页 |
| ·Modality Frequency in Chinese Corpus | 第58-59页 |
| ·Comparison | 第59-60页 |
| ·Findings | 第60-66页 |
| ·Similarities of IM Realized by Modality System | 第60-64页 |
| ·The Nature of News- Objectivity is Presented by Modality System | 第60-62页 |
| ·Politeness is Presented by Modality System | 第62-64页 |
| ·Differences of Interpersonal Meaning Realized by Modality System | 第64-66页 |
| ·Different Social-Cultural Factors Influence the IM Realized by Modality System | 第64-65页 |
| ·Different Ideology Existed in China and Western Countries | 第65-66页 |
| 5. Conclusion | 第66-69页 |
| ·Conclusion | 第66-67页 |
| ·Implications | 第67-68页 |
| ·Limitations and Suggestions for Further Study | 第68-69页 |
| Acknowledgements | 第69-70页 |
| Bibliography | 第70-71页 |
