| Acknowledgements | 第4-5页 |
| Abstract | 第5-6页 |
| 摘要 | 第7-10页 |
| Chapter 1 Introduction | 第10-14页 |
| 1.1 Research Background | 第10页 |
| 1.2 Research Methodology | 第10-11页 |
| 1.3 Research Purpose | 第11-12页 |
| 1.4 Thesis Structure | 第12-14页 |
| Chapter 2 Literature Review and Theoretical Framework | 第14-20页 |
| 2.1 Studies of Fortress Besieged at Home and Abroad | 第14-15页 |
| 2.2 Studies of Idiomatic Variation from the Perspective of Construction Grammar at Home and Abroad | 第15-16页 |
| 2.3 Theoretical Framework | 第16-20页 |
| Chapter 3 Classification and Linguistic Characteristics of Idiomatic Variation | 第20-24页 |
| 3.1 Classification of Idiomatic Variation | 第20-22页 |
| 3.2 Linguistic Characteristics of Idiomatic Variation | 第22-24页 |
| Chapter 4 Generating Mechanism and Effect of Idiomatic Variation | 第24-40页 |
| 4.1 Effect in Terms of Coercion | 第24-27页 |
| 4.1.1 Effect in Terms of Constructional Coercion | 第24-25页 |
| 4.1.2 Effect in Terms of Lexical Coercion | 第25-27页 |
| 4.2 Effect in Terms of Construal | 第27-37页 |
| 4.2.1 Effect in Terms of Specificity | 第28-29页 |
| 4.2.2 Effect in Terms of Focusing | 第29-34页 |
| 4.2.3 Effect in Terms of Prominence | 第34-36页 |
| 4.2.4 Effect in Terms of Perspective | 第36-37页 |
| 4.3 Effect in Terms of Constructional Integration | 第37-40页 |
| Chapter 5 Construing Mechanism and Effect of Idiomatic Variation | 第40-49页 |
| 5.1 Metaphor in Construing Linguistic and Literary Effect | 第40-43页 |
| 5.2 Metonymy in Construing Linguistic and Literary Effect | 第43-45页 |
| 5.3 Iconicity in Construing Linguistic and Literary Effect | 第45-47页 |
| 5.4 Categorization in Construing Linguistic and Literary Effect | 第47-49页 |
| Chapter 6 Conclusion | 第49-54页 |
| 6.1 Summary | 第49-52页 |
| 6.2 Limitations of the Research and Suggestions for Future Research | 第52-54页 |
| Bibliography | 第54-58页 |
| Appendix | 第58-65页 |
| 攻读硕士学位期间的科研成果 | 第65页 |
