| 摘要 | 第5-6页 |
| ABSTRACT | 第6页 |
| List of Abbreviations | 第7-11页 |
| Chapter 1 Introduction | 第11-15页 |
| 1.1 Research Background | 第11-12页 |
| 1.2 Research Questions | 第12页 |
| 1.3 Research Significance | 第12-13页 |
| 1.4 Layout of the Thesis | 第13-15页 |
| Chapter 2 Literature Review | 第15-29页 |
| 2.1 Definition and Function of Logical Conjunctions | 第15-17页 |
| 2.1.1 Definition of Logical Conjunctions | 第15-17页 |
| 2.1.2 Logical Conjunctions Functioning as Cohesive Devices | 第17页 |
| 2.2 Semantic Classification of Logical Conjunctions | 第17-24页 |
| 2.2.1 Quirk's Classification | 第17-19页 |
| 2.2.2 Biber's Classification | 第19-20页 |
| 2.2.3 Halliday & Hasan's Classification | 第20-23页 |
| 2.2.4 Semantic Classification of Logical Conjunctions in the Present Study | 第23-24页 |
| 2.3 Positional Classification of Logical Conjunctions | 第24-25页 |
| 2.4 Previous Studies on Logical Conjunctions | 第25-29页 |
| 2.4.1 The Use of Logical Conjunctions between Native Speakers and EFLLearners | 第25-27页 |
| 2.4.2 The Use of Logical Conjunctions across Different Genres | 第27-29页 |
| Chapter 3 Research Methodology | 第29-35页 |
| 3.1 Corpus-Based Approach | 第29页 |
| 3.2 Corpora Used | 第29-32页 |
| 3.2.1 Introduction of CLC | 第30-31页 |
| 3.2.2 Introduction of NSC | 第31-32页 |
| 3.3 Data Collection and Analysis | 第32-35页 |
| 3.3.1 Tools used for Data Collection and Analysis | 第32页 |
| 3.3.2 Procedures for Data Collection and Analysis | 第32-35页 |
| Chapter 4 Results and Discussion | 第35-64页 |
| 4.1 Frequency Distribution of Logical Conjunctions | 第35-41页 |
| 4.1.1 Overall Frequency of Logical Conjunctions | 第35-36页 |
| 4.1.2 Top 20 Logical Conjunctions in the Two Corpora | 第36-38页 |
| 4.1.3 General Distribution of LCs in Different Semantic Types | 第38-41页 |
| 4.2 Semantic Relations of Logical Conjunctions | 第41-50页 |
| 4.2.1 Logical Conjunctions in Listing Relation | 第41-46页 |
| 4.2.2 Logical Conjunctions in Appositive Relation | 第46-47页 |
| 4.2.3 Logical Conjunctions in Resultive/Inferential Relation | 第47-49页 |
| 4.2.4 Logical Conjunctions in Contrastive/Concessive Relation | 第49-50页 |
| 4.3 Position of Logical Conjunctions in Sentences | 第50-64页 |
| 4.3.1 Logical Conjunctions in the Initial Position of Sentences | 第53-57页 |
| 4.3.2 Logical Conjunctions in the Middle Position of Sentences | 第57-60页 |
| 4.3.3 Logical Conjunctions in the Final Position of Sentences | 第60-61页 |
| 4.3.4 Positional Distribution of Top 5 Logical Conjunctions in the Two Corpora | 第61-64页 |
| Chapter 5 Conclusion | 第64-67页 |
| 5.1 Major Finding of the Study | 第64-65页 |
| 5.2 Implications of the Research | 第65页 |
| 5.3 Limitations and Suggestions | 第65-67页 |
| References | 第67-72页 |
| Appendices | 第72-104页 |
| Acknowledgements | 第104页 |
