| 摘要 | 第4-5页 |
| Abstract | 第5-6页 |
| Introduction | 第10-13页 |
| Chapter One Literature Review | 第13-30页 |
| 1.1 Main Issues Concerning Vague Language | 第13-22页 |
| 1.1.1 The role of vagueness in language | 第13-14页 |
| 1.1.2 Definition of vagueness | 第14-16页 |
| 1.1.3 Pragmatic functions of vague language | 第16-18页 |
| 1.1.4 Categorization of vague language | 第18-22页 |
| 1.2 Teacher Language in EFL Classroom | 第22-24页 |
| 1.2.1 The importance of teacher language in EFL classroom | 第22-23页 |
| 1.2.2 Current situation of Chinese teacher language in EFL classroom | 第23-24页 |
| 1.2.3 The necessity for application of vague language in EFL classroom | 第24页 |
| 1.3 Research on Vague Language Abroad and at Home | 第24-30页 |
| 1.3.1 Research on vague language abroad | 第25-26页 |
| 1.3.2 Research on vague language at home | 第26-30页 |
| Chapter Two Research Methodology | 第30-37页 |
| 2.1 Research Questions | 第30页 |
| 2.2 Research Subjects | 第30-31页 |
| 2.3 Research Instruments | 第31-33页 |
| 2.3.1 Contrastive research | 第31-32页 |
| 2.3.2 In-class audio-recording | 第32-33页 |
| 2.3.3 Classroom observation and field notes | 第33页 |
| 2.4 Research Procedures | 第33-37页 |
| 2.4.1 In-class observation and data collection | 第34-36页 |
| 2.4.2 After-class data reorganization | 第36-37页 |
| Chapter Three Data Analysis | 第37-44页 |
| 3.1 Audio-recording Data Analysis | 第37-41页 |
| 3.1.1 Occurrence frequency by category of vague language | 第37-39页 |
| 3.1.2 Similarities of vague language by native English teachers and ChineseEnglish teachers | 第39-40页 |
| 3.1.3 Differences of vague language by native English teachers and ChineseEnglish teachers | 第40-41页 |
| 3.2 Classroom Observation Analysis | 第41-44页 |
| 3.2.1 Pragmatic functions of vague language in EFL classroom | 第42-43页 |
| 3.2.2 Teacher-student interaction analysis | 第43-44页 |
| Chapter Four Findings and Discussion | 第44-50页 |
| 4.1 Research Findings | 第44-46页 |
| 4.2 Pedagogical Implications and Suggestions | 第46-48页 |
| 4.3 Limitations | 第48-50页 |
| Conclusion | 第50-53页 |
| Acknowledgements | 第53-54页 |
| References | 第54-59页 |
| Appendix I Transcript Sample of Native English Teacher Class | 第59-60页 |
| Appendix II Transcript Sample of Chinese English Teacher Class | 第60-61页 |
| Appendix III Field Notes of Classroom Observation | 第61-62页 |
| 攻读学位期间的研究成果 | 第62-63页 |
