| Acknowledgements | 第1-7页 |
| List of figures and tables | 第7-8页 |
| Abstract in Chinese | 第8-9页 |
| Abstract in English | 第9-11页 |
| Chapter I introduction | 第11-14页 |
| Chapter 2. Theoretical framework | 第14-32页 |
| ·An overview of relevance theory | 第14-21页 |
| ·Human communication | 第14-15页 |
| ·Mutually manifest assumptions | 第15-16页 |
| ·Intention & inference | 第16-17页 |
| ·Relevance theory | 第17-21页 |
| ·Code-switching and related studies | 第21-27页 |
| ·Definition of Code-switching | 第22-23页 |
| ·Brief theoretical review of code-switching | 第23-27页 |
| ·General picture of code-switching research and the research purpose of this thesis | 第23-24页 |
| ·Gumpez: Code-switching and contextualization | 第24-25页 |
| ·Myers-Scotton: Markedness model | 第25-27页 |
| ·Newspaper as a means of ostensive-inferential communication | 第27-29页 |
| ·Code-switching in newspapers from a relevance perspective | 第29-32页 |
| ·Is code-switching a violation to relevance? | 第29-30页 |
| ·The communicative purpose of newspapers | 第29页 |
| ·Maximum relevance and optimal relevance | 第29-30页 |
| ·Apply relevance theory to code-switching in newspapers | 第30-32页 |
| Chapter 3. Data analysis | 第32-40页 |
| ·Sources of data | 第32-33页 |
| ·Analysis of the data | 第33-40页 |
| ·Number of code-switching in 4 newspapers | 第33-37页 |
| ·Occurrence frequency of code-switching in 4 newspapers | 第37-40页 |
| Chapter 4. Relevance theory for the study of code-switching in newspapers | 第40-60页 |
| ·Some characteristics of code-switching in different newspapers | 第40-44页 |
| ·Reasons for using code-switching in different newspapers and discourses and their effects on communication | 第44-56页 |
| ·Social reasons | 第44-53页 |
| ·The choice of topics | 第45-47页 |
| ·Formality of the topic | 第45-46页 |
| ·Adaptation of the topic | 第46-47页 |
| ·Economic principle | 第47-49页 |
| ·Social distance | 第49-53页 |
| ·Psychological reasons | 第53-56页 |
| ·Discrimination | 第54-55页 |
| ·Concealment | 第55-56页 |
| ·Code-switching and optimal relevance | 第56-60页 |
| Chapter 5. Conclusion | 第60-63页 |
| ·Major findings of the study | 第60-61页 |
| ·Some suggestions for further research | 第61-63页 |
| Bibliography | 第63-67页 |
