| Acknowledgements | 第1-6页 |
| Abstract | 第6-9页 |
| 中文摘要 | 第9-13页 |
| List of Tables and Figures | 第13-14页 |
| List of Abbreviations | 第14-15页 |
| Chapter One Introduction | 第15-18页 |
| ·Overview | 第15页 |
| ·Need for the study | 第15-16页 |
| ·Significance of the study | 第16-17页 |
| ·Structure of the thesis | 第17-18页 |
| Chapter Two Literature Review | 第18-34页 |
| ·Defining and categorizing formulaic sequence | 第18-25页 |
| ·Definition of formulaic sequence | 第19-22页 |
| ·Categorization of formulaic sequence | 第22-25页 |
| ·Some theories related to the present study | 第25-30页 |
| ·Challenging compositional approaches to semantics | 第25-28页 |
| ·Functions of formulaic sequence | 第28-30页 |
| ·Related empirical studies | 第30-33页 |
| ·Related empirical studies abroad | 第30-32页 |
| ·Related empirical studies at home | 第32-33页 |
| ·Summary | 第33-34页 |
| Chapter Three Methodology | 第34-42页 |
| ·Research questions | 第34-35页 |
| ·Data collection | 第35-37页 |
| ·Corpus description | 第35-36页 |
| ·A description of expository writing | 第36-37页 |
| ·Data analysis | 第37-41页 |
| ·Data preparation | 第37-38页 |
| ·Data analyzing procedures | 第38-41页 |
| ·Summary | 第41-42页 |
| Chapter Four Results and Discussion | 第42-59页 |
| ·General characteristics of formulaic sequences | 第42-44页 |
| ·Frequency and variety of formulaic sequences | 第42-43页 |
| ·Categories of formulaic sequences and their distribution | 第43-44页 |
| ·Differences in the use of formulaic sequences between timed and untimed writing conditions | 第44-49页 |
| ·Differences in frequency between timed and untimed writing conditions | 第45-46页 |
| ·Differences in variety between timed and untimed writing conditions | 第46-47页 |
| ·Differences in distribution between timed and untimed writing conditions | 第47-49页 |
| ·Differences in the use of formulaic sequences across different proficiency levels | 第49-53页 |
| ·Differences in frequency across two proficiency levels | 第49-50页 |
| ·Differences in variety across two proficiency levels | 第50页 |
| ·Differences in distribution across two proficiency levels | 第50-53页 |
| ·Relationship between use of formulaic sequences and proficiency | 第53-57页 |
| ·Relationship between frequency and proficiency | 第53-54页 |
| ·Relationship between variety and proficiency | 第54页 |
| ·Predicting indicator to the learners’writing proficiency | 第54-57页 |
| ·Summary | 第57-59页 |
| Chapter Five Conclusion | 第59-63页 |
| ·Major findings | 第59-60页 |
| ·Pedagogical implications | 第60-61页 |
| ·Limitations of this study | 第61-62页 |
| ·Suggestions for future research | 第62-63页 |
| References | 第63-66页 |
| Appendices | 第66-72页 |
| Appendix I | 第66-69页 |
| Appendix II | 第69-72页 |
| 攻读学位期间的学术成果 | 第72页 |
