| 摘要 | 第1-7页 |
| Abstract | 第7-12页 |
| Chapter One Introduction | 第12-17页 |
| ·Research Background | 第12-15页 |
| ·The Purpose and Significance of the Study | 第15-16页 |
| ·Overview of the Thesis | 第16-17页 |
| Chapter Two Literature Review | 第17-36页 |
| ·The Definition and Classification of DMs | 第17-21页 |
| ·The Definition of DMs | 第17-18页 |
| ·The Classification of DMs at Home and Abroad | 第18-21页 |
| ·The Definition and Classification of Causal DMs | 第21-24页 |
| ·The Definition of Causal DMs | 第21页 |
| ·The Classification of Causal DMs at Home and Abroad | 第21-24页 |
| ·The Study of DMs at Home and Abroad | 第24-36页 |
| ·The Study of DMs at Abroad | 第24-32页 |
| ·The Study of DMs at Home | 第32-36页 |
| Chapter Three The Methodologies and Procedure | 第36-45页 |
| ·Research Questions | 第36页 |
| · | 第36-38页 |
| ·Corpus-based Approach | 第36-37页 |
| ·CIA | 第37-38页 |
| ·Corpora Used in This Study | 第38-39页 |
| ·The ST3 and ST4 in CLEC | 第38-39页 |
| ·The Argumentative Essays in LOCNESS | 第39页 |
| ·The Research Tools | 第39-40页 |
| ·Data Collection and Procedure | 第40-45页 |
| ·Data Collection and Procedure | 第40-42页 |
| ·Manual Work to Identify the Right Multi-semantic Causal DMs | 第42-45页 |
| Chapter Four Data Analysis and Discussion | 第45-71页 |
| ·The Comparison of the Use of Causal DMs Between ST3 and ST4 | 第45-49页 |
| ·The Brief Comparison Between ST3 and ST4 | 第45-46页 |
| ·The Comparison of the Use of Causal DMs Between ST3 and ST4 | 第46-49页 |
| ·The Comparisons of the Use of Causal DMs Between CLEC and LOCNE | 第49-54页 |
| ·The Brief Comparison Between CLEC and LOCNESS | 第49-51页 |
| ·The Comparison of the Use of Causal DMs in LOCNESS and CLEC | 第51-54页 |
| ·The Overused and Underused Causal DMs by Chinese non-English Major College Students | 第54-60页 |
| ·The Overused Causal DMs | 第56-57页 |
| ·The Underused Causal DMs | 第57-58页 |
| ·The Use of So and Because in CLEC and LOCNESS | 第58-60页 |
| ·The Improper Uses of Causal DMs | 第60-67页 |
| ·The Position of Adverbial Causal DMs | 第60-61页 |
| ·The Use of Informal Causal DMs in Writings | 第61-62页 |
| ·The Abundant Use of Causal DMs | 第62-63页 |
| ·The Confusion of Causal DMs | 第63-65页 |
| ·Other Misuses of Causal DMs | 第65-67页 |
| ·Discussion: Possible Elements Causing the Improper Uses of Causal DMs | 第67-71页 |
| ·L1 Transfer | 第67-69页 |
| ·Cognitive Factors | 第69页 |
| ·Input Bias | 第69-71页 |
| Chapter Five Conclusion | 第71-77页 |
| ·Major Findings of the Study | 第71-74页 |
| ·Pedagogical Implications of the Study | 第74-75页 |
| ·Limitations and Suggestions for Further Study | 第75-77页 |
| Bibliography | 第77-81页 |
| List of Tables and Figures | 第81-82页 |
| Acknowledgements | 第82-83页 |
| 个人简历 | 第83页 |
| 发表的学术论文 | 第83页 |
