Chapter 1 Introduction Chapter 2 Theoretical Foundations Chapter 3 Literature Review Chapter 4 Polysemic Analysis of the Past Tense Mainly from the Perspectives of CMT and CBT Chapter 5 A Polysemic Analysis of the Present Tense Mainly from the Perspectives of CMYT and CBT Chapter 6 An Analysis of the Semantic Interactions between Tense and the Perfect Aspect from the Perspective of CBT Chapter 7 Conclusion