| 摘要 | 第5-6页 |
| Abstract | 第6-7页 |
| Abbreviations | 第11-14页 |
| Chapter 1 Introduction | 第14-18页 |
| 1.1 Research background | 第14-15页 |
| 1.2 Objectives of this thesis | 第15页 |
| 1.3 Significance of this thesis | 第15页 |
| 1.4 Theoretical foundation | 第15-16页 |
| 1.5 The layout of this thesis | 第16-18页 |
| Chapter 2 Literature Review | 第18-28页 |
| 2.1 Studies on English modal verbs | 第18-23页 |
| 2.1.1 Studies on semantics of English modal verbs | 第18-20页 |
| 2.1.2 Studies on pragmatics of English modal verbs | 第20-21页 |
| 2.1.3 Studies on the cognitive study of English modal verbs | 第21页 |
| 2.1.4 Studies on word sense disambiguation | 第21-23页 |
| 2.2 Studies on application of FCA in language processing | 第23-25页 |
| 2.2.1 Applications of FCA in linguistics abroad and at home | 第23-24页 |
| 2.2.2 Applications of FCA in other fields | 第24-25页 |
| 2.3 Studies on knowledge discovery | 第25-26页 |
| 2.4 Space for the present study | 第26-28页 |
| Chapter 3 Methodology | 第28-36页 |
| 3.1 Research methods | 第28-30页 |
| 3.2 Data collection | 第30-31页 |
| 3.3 Software used in this thesis | 第31-33页 |
| 3.4 Research procedure | 第33页 |
| 3.5 Summary | 第33-36页 |
| Chapter 4 Semantic Categorization of English Modal Verbs Can and May | 第36-42页 |
| 4.1 Sense categorization of the English modal verbs can | 第36-38页 |
| 4.1.1 Root ability of can | 第36-37页 |
| 4.1.2 Root possibility of can | 第37页 |
| 4.1.3 Root permission of can | 第37-38页 |
| 4.2 Sense categorization of the English modal verbs may | 第38-39页 |
| 4.2.1 Epistemic possibility of may | 第38页 |
| 4.2.2 Root possibility of may | 第38页 |
| 4.2.3 Root permission of may | 第38-39页 |
| 4.3 The reason for choosing can and may | 第39-40页 |
| 4.4 Summary | 第40-42页 |
| Chapter 5 WSD of Can and May | 第42-76页 |
| 5.1 General description of construction of the model for WSD | 第42-43页 |
| 5.2 Tagging senses and selecting sample sentences | 第43-44页 |
| 5.3 Features extraction | 第44-47页 |
| 5.3.1 Calculation of mutual information | 第44-46页 |
| 5.3.2 Selection of syntactic features | 第46-47页 |
| 5.4 Construction of formal context | 第47-64页 |
| 5.4.1 Interval division of MIs for can | 第47-56页 |
| 5.4.2 Interval division of MIs for may | 第56-64页 |
| 5.5 Generation of APOSDs for can and may | 第64-66页 |
| 5.5.1 Generation of APOSDs for can and may | 第64页 |
| 5.5.2 The validation of APOSDs | 第64-66页 |
| 5.6 Simplification of APOSD | 第66-69页 |
| 5.7 Rules extraction | 第69-75页 |
| 5.8 Summary | 第75-76页 |
| Chapter 6 Knowledge Discovery | 第76-86页 |
| 6.1 Relevance factors between can and may in the sense of possibility | 第76-82页 |
| 6.1.1 Comparison of RTPOBcan and RTPOBmay | 第77-79页 |
| 6.1.2 Comparison of RTPOBcan and EPOBmay | 第79-81页 |
| 6.1.3 Comparison of root possibility and epistemic possibility | 第81-82页 |
| 6.2 Relevance factors between can and may in the sense of root permission | 第82-84页 |
| 6.3 Summary | 第84-86页 |
| Chapter 7 Conclusion | 第86-90页 |
| 7.1 Main findings | 第86-87页 |
| 7.2 Implications | 第87页 |
| 7.3 Limitations of the present study | 第87-88页 |
| 7.4 Suggestions for the further research | 第88-90页 |
| References | 第90-94页 |
| Appendix Ⅰ | 第94-100页 |
| Appendix Ⅱ | 第100-106页 |
| Appendix Ⅲ | 第106-108页 |
| Appendix Ⅳ | 第108-110页 |
| Acknowledgements | 第110页 |
