| Acknowledgments | 第1-7页 |
| Abstract | 第7-9页 |
| 中文摘要 | 第9-10页 |
| 前言 | 第10-13页 |
| Introduction | 第13-14页 |
| Chapter 1 Theoretical background | 第14-22页 |
| 1．1 Introduction | 第14页 |
| 1．2 Behaviorist view and nativist view of input | 第14-15页 |
| 1．3 Input hypothesis | 第15-17页 |
| 1．4 Information processing theories | 第17页 |
| 1．5 Interactionism theories | 第17-19页 |
| 1．6 Teacher talk: input in the classroom | 第19-21页 |
| 1．7 Summary | 第21-22页 |
| Chapter 2 A Selective Empirical Studies Review | 第22-33页 |
| 2．1 Introduction | 第22页 |
| 2．2 Classroom-based second language research | 第22-24页 |
| 2．3 Research on teacher talk | 第24-25页 |
| 2．4 Studies on linguistic features of teacher talk | 第25-32页 |
| 2．4．1 Amount of teacher talk | 第26页 |
| 2．4．2 Functional distribution of teacher talk | 第26-28页 |
| 2．4．3 Modifications in teacher speech | 第28-32页 |
| 2．5 Summary | 第32-33页 |
| Chapter 3 The Present Study Research | 第33-42页 |
| 3．1 The purpose of the study and research questions | 第33-34页 |
| 3．2 Subjects | 第34-35页 |
| 3．3 Data collection | 第35页 |
| 3．4 Data analysis | 第35-41页 |
| 3．4．1 Amount of teacher talk | 第35-36页 |
| 3．4．2 Functional distribution of teacher talk | 第36-38页 |
| 3．4．3 Rate of speech | 第38页 |
| 3．4．4 Vocabulary range in teacher talk | 第38-40页 |
| 3．4．5 Syntactic Features | 第40-41页 |
| 3．4．6 Self-repetition as discourse modification | 第41页 |
| 3．5 Summary | 第41-42页 |
| Chapter 4 Results and Discussion | 第42-59页 |
| 4．1 Introduction | 第42页 |
| 4．2 Part I: The findings | 第42-50页 |
| 4．2．1 Amount of teacher talk | 第42-43页 |
| 4．2．2 Functional distribution of teacher talk | 第43-45页 |
| 4．2．3 Rate of speech | 第45页 |
| 4．2．4 Vocabulary range in teacher talk | 第45-46页 |
| 4．2．5 Syntactic features | 第46-49页 |
| 4．2．6 Self-repetition as discourse modification | 第49-50页 |
| 4．3 Part II discussion of the results | 第50-58页 |
| 4．3．1 Amount of teacher talk | 第50-53页 |
| 4．3．2 Functional distribution of teacher talk | 第53-55页 |
| 4．3．3 Rate of speech | 第55页 |
| 4．3．4 Vocabulary range in teacher talk | 第55-56页 |
| 4．3．5 Syntactic features | 第56-58页 |
| 4．3．6 Self-repetition as discourse modification | 第58页 |
| 4．4 Summary | 第58-59页 |
| Chapter 5 Conclusion | 第59-62页 |
| 5．1 Major findings | 第59页 |
| 5．2 Pedagogical Implications | 第59-60页 |
| 5．3 Limitations of the Present Study and Suggestions for the Future Research | 第60-62页 |
| Bibliography | 第62-66页 |
