| Acknowledgements | 第1-7页 |
| Abstract | 第7-9页 |
| 摘要 | 第9-13页 |
| Chapter I Introduction | 第13-17页 |
| ·Definition of teacher talk | 第13页 |
| ·Significance of teacher talk | 第13-15页 |
| ·Purpose of this study | 第15-16页 |
| ·Structure of the thesis | 第16-17页 |
| Chapter II Literature review | 第17-36页 |
| ·Review of teacher talk | 第17-24页 |
| ·Previous research on teacher talk | 第17-18页 |
| ·Characteristics of teacher talk | 第18-19页 |
| ·Comprehensible input | 第19-22页 |
| ·Structure of classroom discourse-IRF | 第22页 |
| ·Difference between language in language-teaching and other classrooms | 第22-23页 |
| ·Context of second language instruction | 第23-24页 |
| ·Review of politeness | 第24-34页 |
| ·Politeness and its theories | 第24-25页 |
| ·Face created by Goffman | 第25页 |
| ·Grice and cooperative principle | 第25-27页 |
| ·Leech and politeness principle | 第27-28页 |
| ·Brown and Levinson and politeness theory | 第28-34页 |
| ·Model persons | 第28-29页 |
| ·Face | 第29页 |
| ·Negative and positive face and politeness | 第29-30页 |
| ·Face threatening act and face saving act | 第30-31页 |
| ·Politeness strategies | 第31-32页 |
| ·Future research and criticism | 第32-33页 |
| ·Politeness in Chinese culture | 第33页 |
| ·Politeness and face in teacher talk | 第33-34页 |
| ·Summary | 第34-36页 |
| Chapter III Data collection and analysis | 第36-41页 |
| ·Research procedures | 第36页 |
| ·Subjects and instruments | 第36-37页 |
| ·Data collection | 第37-38页 |
| ·College English classroom interaction features | 第38-41页 |
| ·Amount of teacher talk in classroom | 第38-39页 |
| ·Movement of the teachers | 第39页 |
| ·Native language and second language in classrooms | 第39页 |
| ·Authentic and non-authentic language | 第39-41页 |
| Chapter IV Findings | 第41-57页 |
| ·Politeness in instructions | 第41-43页 |
| ·Repeating main points | 第41-42页 |
| ·Speaking more slowly | 第42页 |
| ·Using pauses | 第42-43页 |
| ·Changing pronunciation | 第43页 |
| ·Simplifying grammar | 第43页 |
| ·Politeness in questioning | 第43-48页 |
| ·Teachers'questions | 第43-45页 |
| ·Politeness in questioning | 第45-48页 |
| ·Pointing out difficulty | 第45页 |
| ·Questioning in different types | 第45-46页 |
| ·Student participation | 第46页 |
| ·Waiting | 第46-47页 |
| ·Offering help | 第47页 |
| ·Summary | 第47-48页 |
| ·Politeness in feedback-giving | 第48-53页 |
| ·Acknowledging a correct answer | 第49页 |
| ·Praising | 第49-50页 |
| ·Repeating | 第50页 |
| ·Summarizing | 第50-51页 |
| ·Appreciating | 第51-52页 |
| ·Neglecting errors | 第52页 |
| ·Encouraging | 第52-53页 |
| ·Summary | 第53页 |
| ·Face-threatening acts in classrooms | 第53-54页 |
| ·Other politeness strategies | 第54-57页 |
| ·Off record | 第54-55页 |
| ·Positive politeness | 第55-56页 |
| ·Negative politeness | 第56-57页 |
| Chapter V Conclusion | 第57-63页 |
| ·Overview of politeness in teacher talk | 第57-60页 |
| ·Implications | 第60-61页 |
| ·Teacher-student relationship | 第60页 |
| ·Study of politeness in specific context | 第60-61页 |
| ·Significant aspect in teachers' training | 第61页 |
| ·Limitations and some further suggestions of this study | 第61-63页 |
| Bibliography | 第63-65页 |
