| Acknowledgements | 第3-5页 |
| Abstract | 第5-8页 |
| 摘要 | 第9-13页 |
| Chapter One Introduction | 第13-19页 |
| 1.1 Significance of the Study | 第13-14页 |
| 1.2 Objectives and Research Questions of the Study | 第14-15页 |
| 1.3 Research Methodology and Source of Data | 第15-16页 |
| 1.4 Organization of the Study | 第16-19页 |
| Chapter Two Literature Review | 第19-31页 |
| 2.1 A Brief Introduction to Causality | 第19-20页 |
| 2.1.1 Causality from Philosophical Perspective | 第19-20页 |
| 2.1.2 Causality from Logical Perspective | 第20页 |
| 2.2 Previous Studies on Because-Clause | 第20-27页 |
| 2.2.1 Traditional Grammar Approach | 第21-22页 |
| 2.2.2 The Contrastive Approach | 第22-23页 |
| 2.2.3 The Functional-Pragmatic Approach | 第23页 |
| 2.2.4 The Cognitive Approach | 第23-27页 |
| 2.3 Limitation of the Previous Studies | 第27-28页 |
| 2.4 Summary | 第28-31页 |
| Chapter Three Theoretical Foundation | 第31-39页 |
| 3.1 A Brief Introduction of Cognitive Grammar | 第31-32页 |
| 3.2 Meaning is Conceptualization | 第32-34页 |
| 3.3 Langacker's View on Subjectivity and Subjectification | 第34-39页 |
| Chapter Four Data Analysis and Discussion | 第39-51页 |
| 4.1 Syntactic Features of Because-Clause | 第39-43页 |
| 4.1.1 Syntactic Classification of Because-Clause | 第40-42页 |
| 4.1.2 Interchangeability between Main Clause and Subordinate Clause | 第42-43页 |
| 4.2 Semantic Features of Because-Clause | 第43-46页 |
| 4.3 Pragmatic Features of Because-Clause | 第46-48页 |
| 4.4 Summary | 第48-51页 |
| Chapter Five Cognitive Analysis of Because-Clause | 第51-71页 |
| 5.1 Sequence of Events of Because-Clause | 第51-53页 |
| 5.2 Cognitive Grammar Analysis of Because-Clause | 第53-62页 |
| 5.2.1 Subjectivity in Language | 第55页 |
| 5.2.2 Subjectivity in Semantics | 第55-56页 |
| 5.2.3 The Cognitive Semantic Basis of Because-Clause | 第56-60页 |
| 5.2.4 Cognitive Feature of Because-Clause | 第60-62页 |
| 5.3 Restrictive Conditions on the Sequence between Main Clause and Subordinate Clause | 第62-69页 |
| 5.3.1 Syntactic Restrictive Condition | 第62-64页 |
| 5.3.2 Semantic Restrictive Condition | 第64-66页 |
| 5.3.3 Pragmatic Restrictive Condition | 第66-69页 |
| 5.4 Summary | 第69-71页 |
| Chapter Six Conclusion | 第71-77页 |
| 6.1 Summary of Main Findings | 第71-74页 |
| 6.2 Limitation and Contribution of the Study | 第74-75页 |
| 6.3 Recommendation of Further Research | 第75-77页 |
| Bibliography | 第77-81页 |
