| Abstract in Chinese | 第3-5页 |
| Abstract in English | 第5-6页 |
| Chapter 1 Introduction | 第12-16页 |
| 1.1 Background of the Study | 第12-13页 |
| 1.2 Research Purpose and Significance of the Study | 第13-14页 |
| 1.2.1 Research Purpose | 第13页 |
| 1.2.2 Significance of the Study | 第13-14页 |
| 1.3 Structure of the Thesis | 第14-16页 |
| Chapter 2 Literature Review | 第16-31页 |
| 2.1 The Description of Discourse Power | 第16-20页 |
| 2.1.1 Foucault' Discourse Theory | 第16-17页 |
| 2.1.2 Teacher Talk | 第17-19页 |
| 2.1.3 The Description of Students' Discourse Power | 第19-20页 |
| 2.2 Theories of Second-Language Acquisition | 第20-24页 |
| 2.2.1 Krashen's Comprehensible Input Hypothesis and Swain's ComprehensibleOutput Hypothesis | 第20-21页 |
| 2.2.2 Long's Negotiated Interaction Theory | 第21-22页 |
| 2.2.3 Affective Filter Hypothesis | 第22页 |
| 2.2.4 Sociolcultural Theory | 第22-24页 |
| 2.3 Previous Studies on Classroom Discourse Power | 第24-29页 |
| 2.3.1 Previous Studies Abroad | 第24-25页 |
| 2.3.2 Previous Studies in China | 第25-29页 |
| 2.4 Theoretical Framework for the Research | 第29-31页 |
| Chapter 3 Research Methodology | 第31-36页 |
| 3.1 Research Questions | 第31页 |
| 3.2 Research Subjects | 第31-32页 |
| 3.3 Research Instruments | 第32-34页 |
| 3.3.1 Classroom Observation and Recording | 第32-33页 |
| 3.3.2 Questionnaire | 第33页 |
| 3.3.3 Interview | 第33-34页 |
| 3.4 Procedure | 第34-36页 |
| 3.4.1 Data Collection | 第34页 |
| 3.4.2 Data Analysis | 第34-36页 |
| Chapter 4 Results Analysis and Discussion | 第36-66页 |
| 4.1 The Status Quo of Students' Discourse Power in Listening and Speaking Class ofVocational College English | 第36-42页 |
| 4.1.1 Interaction between Teacher and Students | 第36-37页 |
| 4.1.2 The Amount of Teacher Talk and Students' Discourse | 第37-39页 |
| 4.1.3 Student's Response | 第39-42页 |
| 4.2 Causes of Insufficient Discourse Power for Students to Give Oral Proficiency | 第42-60页 |
| 4.2.1 Teacher Talk | 第42-51页 |
| 4.2.2 Student's Affective Factors | 第51-57页 |
| 4.2.3 Social-cultural Factor | 第57-60页 |
| 4.3 Results and Discussion of the Interview Data | 第60-63页 |
| 4.3.1 Interview Data from Students | 第60-61页 |
| 4.3.2 Interview Data from Teachers | 第61-63页 |
| 4.4 Summary of the Results | 第63-66页 |
| 4.4.1 The Status Quo of Students' Discourse Power in Listening and Speaking Class | 第63页 |
| 4.4.2 The Main Causes of Insufficient Discourse Power for Students | 第63-66页 |
| Chapter 5 Conclusion | 第66-72页 |
| 5.1 Major Findings | 第66-68页 |
| 5.2 Pedagogical Implications | 第68-70页 |
| 5.3 Limitations of the Research | 第70-71页 |
| 5.4 Suggestions for Further Research | 第71-72页 |
| References | 第72-77页 |
| Appendices | 第77-88页 |
| Appendix Ⅰ Transcription of the Lesson | 第77-83页 |
| Appendix Ⅱ The Questionnaire to Students | 第83-86页 |
| Appendix Ⅲ The Interview Questions to Students | 第86-87页 |
| Appendix Ⅳ The interview Questions to Teachers | 第87-88页 |
| Publications during the Postgraduate Program | 第88-89页 |
| Acknowledgement | 第89-90页 |
