| 摘要 | 第1-6页 |
| ABSTRACT | 第6-11页 |
| Chapter 1 Introduction | 第11-16页 |
| ·English Competence and STCW95 | 第11-12页 |
| ·Choice of Topic | 第12-14页 |
| ·Research Objectives | 第14页 |
| ·Layout of the Thesis | 第14-16页 |
| Chapter 2 Literature Review | 第16-30页 |
| ·Cohesive Devices and Taxonomies of Connectors | 第16-20页 |
| ·Cohesion and Cohesive Devices | 第16-17页 |
| ·Taxonomies of Connectors | 第17-20页 |
| ·Halliday and Hasan's Classification | 第18-19页 |
| ·Halliday's Revised Classification | 第19页 |
| ·Quirk et al's Classification | 第19-20页 |
| ·Chalker's Classification | 第20页 |
| ·Definition and Classification of Causal Connectors | 第20-23页 |
| ·Halliday and Hasan's Classification | 第21-22页 |
| ·Altenberg's Classification | 第22-23页 |
| ·Mo Junhua's Classification | 第23页 |
| ·Classification of Causal Connectors in This Thesis | 第23-25页 |
| ·Previous Studies | 第25-30页 |
| Chapter 3 Material and Methodology | 第30-36页 |
| ·The Corpora Used in the Study | 第30-32页 |
| ·Software Packages Used in the Study | 第32-33页 |
| ·Data Collection and Processing Procedures | 第33-36页 |
| ·Determining the Search Items | 第33页 |
| ·Extracting the Concordances | 第33-34页 |
| ·Processing the Concordances | 第34-35页 |
| ·Performing the Chi-square Tests | 第35-36页 |
| Chapter 4 Results and Discussion | 第36-61页 |
| ·Overall Distribution of Causal Connectors in MEE and BROWN | 第36-37页 |
| ·Top 10 High-frequency Causal Connectors in the Two Corpora | 第37-39页 |
| ·Distribution of Different Types of Causal Connectors in the Two Corpora | 第39-40页 |
| ·Causal Connectors under Each Category in MEE | 第40-56页 |
| ·Conjunctive Causal Connectors in MEE | 第40-45页 |
| ·Distribution of Conjunctive Causal Connectors | 第40-41页 |
| ·Positions of Conjunctive Causal Connectors | 第41-45页 |
| ·Adverbial Causal Connectors in MEE | 第45-53页 |
| ·Distribution of Adverbial Causal Connectors | 第45-46页 |
| ·Positions of Adverbial Causal Connectors | 第46-51页 |
| ·Comparison of therefore,hence,thus and so in MEE and BROWN | 第51-53页 |
| ·Prepositional Causal Connectors in MEE | 第53-56页 |
| ·Distribution of Prepositional Causal Connectors | 第53-54页 |
| ·Positions of Causal Prepositional Phrases | 第54-56页 |
| ·Premodifiers of Phrases and Clauses Introduced by Causal Connectors | 第56-59页 |
| ·Induction & Deduction | 第59-61页 |
| Chapter 5 Conclusion | 第61-63页 |
| ·Major Findings of the Study | 第61-62页 |
| ·Limitations and Suggestions for Further Study | 第62-63页 |
| References | 第63-66页 |
| Appendices | 第66-71页 |
| Acknowledgements | 第71-72页 |
| Resume | 第72页 |
