| Synopsis | 第1-7页 |
| Abstract | 第7-12页 |
| 中文摘要 | 第12-17页 |
| Introduction | 第17-22页 |
| Chapter one Literature Review | 第22-37页 |
| ·Features of Business English and Business English Writing | 第22-25页 |
| ·Brief Introduction to Business English | 第22-23页 |
| ·Classification and Major Features of Business English Writing | 第23-25页 |
| ·The Current Situations in Business English Writing and Its Pedagogical Researches | 第25-27页 |
| ·Current Situations and Problems in Business English Writing | 第25-26页 |
| ·Some Pedagogical Researches Pertinent to Business English Writing at Home and Abroad | 第26-27页 |
| ·Related Theories of Modality | 第27-31页 |
| ·Studies Concerning Modality | 第27-30页 |
| ·Definition of Modality in Systemic-Functional Grammar | 第30-31页 |
| ·Interpersonal Meaning of Modality in Systemic-Functional Grammar | 第31页 |
| ·Functions of Modality in Systemic-Functional Grammar | 第31-36页 |
| ·Modal Auxiliaries | 第31-33页 |
| ·Modal Adjuncts | 第33-34页 |
| ·The Metaphor and Orientation of Modality | 第34-35页 |
| ·Polarity and Three Levels of Modality | 第35-36页 |
| ·Summary | 第36-37页 |
| Chapter Two Research Methodology | 第37-46页 |
| ·Research Questions and Hypothesis | 第37-39页 |
| ·Research Questions | 第37-38页 |
| ·Hypotheses | 第38-39页 |
| ·Participants | 第39页 |
| ·Instruments | 第39-42页 |
| ·Questionnaires | 第39-40页 |
| ·Reliability of the Questionnaires | 第40-41页 |
| ·Pre-test & Post-test | 第41-42页 |
| ·Data Collection and Analysis Procedures | 第42-44页 |
| ·Experimental Procedures | 第44-45页 |
| ·Summary | 第45-46页 |
| Chapter Three Results Analysis and Discussion | 第46-58页 |
| ·The Data Analysis of Background Information Questionnaire | 第46-49页 |
| ·Results and Discussion of Business English Writing Pre-test and Post-test | 第49-55页 |
| ·Results and Discussion of Pre-test of Business English Writing | 第50-52页 |
| ·Results and Discussion of Post-test of Business English Writing | 第52-55页 |
| ·Results and Discussion of Differences between Two Groups after the Modality Training under Systemic-Functional Grammar | 第55-57页 |
| ·Summary | 第57-58页 |
| Chapter Four Findings and Implications | 第58-64页 |
| ·Major Findings of the Present Study | 第58-61页 |
| ·Problems in Modality of Business English Writing | 第59-60页 |
| ·Contribution of the Modality Training to Business English Writing | 第60-61页 |
| ·Implications for Language Teaching and Learning | 第61-62页 |
| ·Limitations of the Present Study and Suggestions for Future Research | 第62-64页 |
| Conclusion | 第64-66页 |
| Bibliography | 第66-70页 |
| Appendix Ⅰ | 第70-71页 |
| Appendix Ⅱ | 第71-72页 |
| Appendix Ⅲ | 第72-73页 |
| Appendix Ⅳ | 第73-74页 |
| 导师及作者简介 | 第74-75页 |
| Acknowledgements | 第75页 |
