| Abstract | 第1-5页 |
| 摘要 | 第5-6页 |
| Contents | 第6-8页 |
| Chapter 1 Introduction | 第8-11页 |
| ·Background for the Study | 第8-9页 |
| ·Significances of the Study | 第9-10页 |
| ·Organization of the Thesis | 第10-11页 |
| Chapter 2 Literature Review | 第11-22页 |
| ·Theoretical Approaches of Modality | 第11-17页 |
| ·Grammatical Study | 第11-12页 |
| ·Semantic Study | 第12-14页 |
| ·Pragmatic Study | 第14-16页 |
| ·Functional Grammatical Study | 第16-17页 |
| ·Empirical Approaches of Modality | 第17-19页 |
| ·Previous Studies of Modality at Home | 第19-22页 |
| Chapter 3 Theoretical Foundation | 第22-35页 |
| ·Brief Introduction of Systemic-Functional Grammar | 第22-23页 |
| ·Modality in Systemic-Functional Grammar | 第23-30页 |
| ·Types of Modality | 第24-27页 |
| ·Orientations of Modality | 第27-29页 |
| ·Values of Modality | 第29-30页 |
| ·Realizations of English Modality | 第30-35页 |
| Chapter 4 Methodology | 第35-38页 |
| ·Research Questions | 第35页 |
| ·Research Design | 第35-38页 |
| ·Research Subject | 第35页 |
| ·Data Selection | 第35-36页 |
| ·Grouping of Corpus Data | 第36-38页 |
| Chapter 5 Results and Discussions | 第38-69页 |
| ·Distributions of the Spoken Modal Meaning Expressions between Intermediate and Advanced Learners | 第38-67页 |
| ·Similarities and Disparities in Terms of Types | 第42-50页 |
| ·Similarities and Disparities in Terms of Orientations | 第50-61页 |
| ·Similarities and Disparities in Terms of Values | 第61-67页 |
| ·Appropriateness of the Spoken Modal Meaning Expressions between Intermediate and Advanced Learners | 第67-69页 |
| Chapter 6 Conclusions | 第69-72页 |
| ·Major Findings of the Study | 第69-70页 |
| ·Implications | 第70页 |
| ·Limitations and Suggestions | 第70-72页 |
| References | 第72-74页 |
| Appendix Ⅰ An Extract of Transcription of Intermediate Spoken Corpus | 第74-75页 |
| Appendix Ⅱ An Extract of Transcription of Advanced Spoken Corpus | 第75-76页 |
| Acknowledgements | 第76页 |
