| ACKNOWLEDGEMENTS | 第8-9页 |
| ABSTRACT | 第9-10页 |
| 摘要 | 第11-15页 |
| CHAPTER Ⅰ INTRODUCTION | 第15-19页 |
| 1.1 Research Background | 第15-16页 |
| 1.2 Objectives of the Present Study | 第16页 |
| 1.3 Rationale of the Thesis | 第16-18页 |
| 1.4 Layout of the Thesis | 第18-19页 |
| CHAPTER Ⅱ LITERATURE REVIEW | 第19-32页 |
| 2.1 Definitions of Code‐switching | 第19-20页 |
| 2.2 Types of Code‐switching | 第20-22页 |
| 2.3 Code‐switching in Diglossia | 第22-25页 |
| 2.3.1 Diglossia | 第22-24页 |
| 2.3.2 The Distinctive Features of Code‐Switching in Diglossia | 第24-25页 |
| 2.4 Different Approaches to the Study of Code‐switching | 第25-32页 |
| 2.4.1 The Grammatical Perspective | 第25-27页 |
| 2.4.2 The Psychological Approach | 第27-28页 |
| 2.4.3 The Conversational Analysis Approach | 第28-29页 |
| 2.4.4 The Pragmatic Approach | 第29-30页 |
| 2.4.5 The Sociolinguistic Approach | 第30-32页 |
| CHAPTER III THEORETICAL FRAMEWORK | 第32-43页 |
| 3.1 Markedness Model | 第32-33页 |
| 3.2 The Markedness Model as the Rational Choice Model | 第33-35页 |
| 3.3 Principle and Maxims of Markedness Model | 第35-38页 |
| 3.3.1 Negotiation Principle | 第36-37页 |
| 3.3.2 Five Maxims in Markedness Model | 第37-38页 |
| 3.4 Social Motivations for Code‐switching under the Markedness Model | 第38-42页 |
| 3.4.1 Code‐switching as Unmarked Choice Maxim | 第38-39页 |
| 3.4.2 Code‐switching as Marked Choice Maxim | 第39-40页 |
| 3.4.3 Code‐switching as Exploratory Choice Maxim | 第40-41页 |
| 3.4.4 Code‐switching as Virtuosity Choice Maxim | 第41页 |
| 3.4.5 Code‐switching as the Deference Choice Maxim | 第41-42页 |
| 3.5 Summary | 第42-43页 |
| CHAPTER Ⅳ RESEARCH METHODOLOGY | 第43-46页 |
| 4.1 Methodology | 第43页 |
| 4.2 Data Collection | 第43-44页 |
| 4.3 Participants | 第44-46页 |
| CHAPTER Ⅴ A CASE STUDY OF BE HIGH ON FM101.1 | 第46-65页 |
| 5.1 Diglossia in Shaanxi | 第46页 |
| 5.2 Features of Code‐switching in Be High On FM 101.1 | 第46-48页 |
| 5.2.1 The Overall Code‐switching in Be High on FM 101.1as a Marked Choice | 第47-48页 |
| 5.2.2 The Relationship between the Code‐ switching and the Performance Style | 第48页 |
| 5.3 Application of the Negotiation Maxims in BE HIGH ON FM101.1 under MM | 第48-59页 |
| 5.3.1 Application of the Marked Choice Maxim in Be High on FM 101.1 under MM | 第48-53页 |
| 5.3.2 Application of the Unmarked Choice Maxim in Be High on FM 101.1 under MM | 第53-57页 |
| 5.3.4 Application of the Deference Choice Maxim in Be High on FM 101.1under MM | 第57-59页 |
| 5.4 Functions of Code‐switching in Be High on FM 101.1 | 第59-64页 |
| 5.4.1 Code‐switching as Humor Generator | 第59-60页 |
| 5.4.2 Code‐switching as a Sign of Stress | 第60-62页 |
| 5.4.3 Code‐switching as Contextual Transition Marker | 第62-63页 |
| 5.4.4 Code‐switching as a Sign of Expressing Intimacy and Solidarity | 第63-64页 |
| 5.5 Summary | 第64-65页 |
| CHAPTER Ⅵ CONCLUSION | 第65-69页 |
| 6.1 Summary of the Main Findings | 第65-67页 |
| 6.2 Implications of the Study | 第67-68页 |
| 6.3 Limitations | 第68-69页 |
| REFERENCES | 第69-73页 |
