| ACKNOWLEDGEMENTS | 第1-4页 |
| ABSTRACT | 第4-5页 |
| 摘要 | 第5-6页 |
| CONTENTS | 第6-8页 |
| Chapter I Introduction | 第8-10页 |
| ·The importance of causal links in language | 第8-9页 |
| ·The purpose of the present study | 第9页 |
| ·Outline of the paper | 第9-10页 |
| Chapter II Previous Studies of Causal Links | 第10-16页 |
| ·Early studies of causal links | 第11-13页 |
| ·Corpus-based comparative studies of causal links | 第13-16页 |
| Chapter III Research Methodologies and Statistical Measures | 第16-21页 |
| ·Causal links examined in the present study | 第16-18页 |
| ·Sources of data | 第18-19页 |
| ·Research methodologies and statistical measures | 第19-21页 |
| ·Research tools | 第19页 |
| ·Statistical measures | 第19-20页 |
| ·Research steps | 第20-21页 |
| Chapter IV The Use of Causal Links in CLEC Compared With Their Use in LOB | 第21-55页 |
| ·The use of causal linking adverbials | 第21-31页 |
| ·Frequencies of causal linking adverbials | 第21-25页 |
| ·Positions of causal linking adverbials | 第25-28页 |
| ·Inappropriate use of causal linking adverbials in CLEC | 第28-31页 |
| ·Uniformly preferred causal linking adverbials | 第28-29页 |
| ·Misuse of causal linking adverbials | 第29-30页 |
| ·Imprecise stylistic use of causal linking adverbials | 第30页 |
| ·Redundant use of causal linking adverbials | 第30-31页 |
| ·The use of causal subordinating linkages | 第31-43页 |
| ·Frequencies of the causal subordinating linkages | 第31-34页 |
| ·Positions of subordinating conjunctions | 第34-37页 |
| ·Inappropriate use of causal subordinating linkages in CLEC | 第37-43页 |
| ·Uniformly preferred causal subordinating conjunction | 第37页 |
| ·Confusing conjunctions with prepositions or prepositional phrase | 第37-38页 |
| ·Conjunction choice mistakes | 第38-40页 |
| ·Problems in expressing causal doubt and certainty | 第40-41页 |
| ·Missing of Conjunctions | 第41-42页 |
| ·Other misuses | 第42-43页 |
| ·The use of prepositional constructions | 第43-49页 |
| ·Frequency of causal prepositional phrases | 第43-46页 |
| ·Positions of causal prepositional phrases | 第46-49页 |
| ·Inappropriate use of causal prepositional phrases in CLEC | 第49页 |
| ·Uniformly preferred causal prepositional phrases | 第49页 |
| ·Confusing causal prepositional phrases with conjunctions | 第49页 |
| ·The use of clause-integrated linkages | 第49-53页 |
| ·Frequencies of clause-integrated linkages | 第49-50页 |
| ·Positions of clause-integrated linkages | 第50-51页 |
| ·Inappropriate use of clause-integrated linkages in CLEC | 第51-53页 |
| ·A summary | 第53-55页 |
| Chapter V Conclusion | 第55-62页 |
| ·Causes of errors | 第55-58页 |
| ·L1 transfer | 第55-57页 |
| ·Input bias | 第57-58页 |
| ·Pedagogical implications | 第58-59页 |
| ·L1 and L2 difference in teaching, learning and research | 第58-59页 |
| ·Corpus-based teaching, learning and research | 第59页 |
| ·Recommendations for further studies | 第59-60页 |
| ·Conclusion | 第60-62页 |
| Bibliography | 第62-65页 |
| 发表论文 | 第65-67页 |
