| Acknowledgements | 第5-7页 |
| Abstract in Chinese | 第7-9页 |
| Abstract in English | 第9-11页 |
| Abbreviations | 第14-17页 |
| Chapter 1 Introduction | 第17-22页 |
| 1.1 Research Background | 第17-18页 |
| 1.2 Research Purpose | 第18-19页 |
| 1.3 Research Significance | 第19-20页 |
| 1.4 The Overall Organization of the Research | 第20-22页 |
| Chapter 2 Literature Review | 第22-32页 |
| 2.1 Previous Studies on Semantic Complexity in L2 Writings | 第22-26页 |
| 2.1.1 Research on Semantic Complexity Abroad | 第22-24页 |
| 2.1.2 Research on Semantic Complexity at Home | 第24-26页 |
| 2.2 Previous Studies on GM in L2 Writings | 第26-31页 |
| 2.2.1 Research on GM Abroad | 第26-28页 |
| 2.2.2 Research on GM at Home | 第28-31页 |
| 2.3 Summary | 第31-32页 |
| Chapter 3 Theoretical Framework | 第32-38页 |
| 3.1 Semantic Complexity | 第32-33页 |
| 3.2 Grammatical Metaphor (GM) | 第33-36页 |
| 3.2.1 Definition of GM | 第33-35页 |
| 3.2.2 Identification of GM | 第35页 |
| 3.2.3 Categorization and Functions of GM | 第35-36页 |
| 3.3 Relationships between Semantic Complexity and GM | 第36-37页 |
| 3.4 Summary | 第37-38页 |
| Chapter 4 Research Methodology | 第38-50页 |
| 4.1 Research Questions | 第38页 |
| 4.2 Research Subject | 第38-39页 |
| 4.3 Research Methods | 第39页 |
| 4.4 Research Instruments | 第39-41页 |
| 4.5 Research Materials | 第41-45页 |
| 4.6 Research Procedures | 第45-50页 |
| Chapter 5 Results and Discussions | 第50-74页 |
| 5.1 The Quantitative Analysis of Semantic Complexity in L2 Writings | 第50-61页 |
| 5.1.1 Semantic Complexity in L2 Writings of Different Grades | 第51-55页 |
| 5.1.2 Semantic Complexity in L2 Writings of Different Composition Levels | 第55-58页 |
| 5.1.3 Semantic Complexity in L2 Writings of Different Distances in Field andTenor | 第58-61页 |
| 5.2 The Qualitative Analysis of Semantic Complexity in L2 Writings | 第61-70页 |
| 5.2.1 Ideational Function of GM | 第62-65页 |
| 5.2.2 Textual Function of GM | 第65-70页 |
| 5.3 Problems of GM Use in the Analysis of Semantic Complexity in L2 Writings | 第70-72页 |
| 5.4 Summary | 第72-74页 |
| Chapter 6 Conclusions | 第74-82页 |
| 6.1 Major Findings of This Study | 第74-76页 |
| 6.2 Implications of This Study | 第76-79页 |
| 6.2.1 Theoretical Implication | 第76-77页 |
| 6.2.2 Methodological Implication | 第77-78页 |
| 6.2.3 Pedagogical Implication | 第78-79页 |
| 6.3 Limitations of This Study | 第79-80页 |
| 6.4 Suggestions for Future Study | 第80-82页 |
| Bibliography | 第82-88页 |
| Appendix Ⅰ Criteria of Scoring Essay | 第88-89页 |
| Papers Published During the Study for M. A. Degree | 第89页 |
