| Acknowledgements | 第4-5页 |
| ABSTRACT | 第5-7页 |
| 摘要 | 第8-14页 |
| Chapter One Introduction | 第14-20页 |
| 1.1 Research background | 第14-17页 |
| 1.2 Research objectives | 第17-18页 |
| 1.3 Significance of the study | 第18-19页 |
| 1.4 Structure of the thesis | 第19-20页 |
| Chapter Two Literature Review | 第20-38页 |
| 2.1 Definitions of lexical bundles | 第20-21页 |
| 2.2 Classifications of lexical bundles | 第21-26页 |
| 2.3 Related theory | 第26-28页 |
| 2.4 Lexical Bundles in Corpus linguistics | 第28-31页 |
| 2.5 Previous studies on L2 lexical bundles | 第31-36页 |
| 2.5.1 Previous studies on L2 written lexical bundles | 第31-34页 |
| 2.5.2 Previous studies on L2 spoken lexical bundles | 第34-36页 |
| 2.6 Research gap | 第36-38页 |
| Chapter Three Research Methodology | 第38-50页 |
| 3.1 Research questions | 第38-39页 |
| 3.2 Corpora used | 第39-41页 |
| 3.3 Retrieval and identification of lexical bundles | 第41-43页 |
| 3.4 Data analysis | 第43-50页 |
| Chapter Four Results and Discussion | 第50-77页 |
| 4.1 Results | 第50-59页 |
| 4.1.1 Structural features of L2 productive lexical bundles | 第50-56页 |
| 4.1.1.1 Similarities and differences in spoken lexical bundles by L2 learners andnative speakers | 第51-53页 |
| 4.1.1.2 Similarities and differences in written lexical bundles by L2 learners andnative speakers | 第53-56页 |
| 4.1.2 Functional features of L2 productive lexical bundles | 第56-59页 |
| 4.1.2.1 Similarities and differences in spoken lexical bundles by L2 learners andnative speakers | 第56-57页 |
| 4.1.2.2 Similarities and differences in written lexical bundles by L2 learners andnative speakers | 第57-59页 |
| 4.2 Discussion | 第59-77页 |
| 4.2.1 Structural features of L2 productive lexical bundles | 第59-68页 |
| 4.2.1.1 Structural features of L2 spoken lexical bundles | 第59-64页 |
| 4.2.1.2 Structural features of L2 written lexical bundles | 第64-68页 |
| 4.2.2 Functional features of L2 productive lexical bundles | 第68-77页 |
| 4.2.2.1 Functional features of L2 spoken lexical bundles | 第68-72页 |
| 4.2.2.2 Functional features of L2 written lexical bundles | 第72-77页 |
| Chapter Five Conclusion | 第77-82页 |
| 5.1 Findings of the study | 第77-78页 |
| 5.2 Implications | 第78-79页 |
| 5.3 Limitations of the present study | 第79-80页 |
| 5.4 Suggestions for further research | 第80-82页 |
| References | 第82-89页 |
