| CHINESE ABSTRACT | 第1-5页 |
| ENGLISH ABSTRACT | 第5-7页 |
| ACKNOWLEDGEMENTS | 第7-10页 |
| 1 Introduction | 第10-14页 |
| 1．1 Background | 第10-12页 |
| 1．2 Justification and purposes of the present research | 第12-13页 |
| 1．3 Research questions | 第13-14页 |
| 2 Rationale in Second Language Learning Relative to the Present Research | 第14-33页 |
| 2．1 Natural setting and classroom setting | 第14-15页 |
| 2．2 Classroom teaching and second language acquisition | 第15-16页 |
| 2．3 Authentic and none-authentic teacher talk | 第16-19页 |
| 2．4 Learning theories relevant to the research | 第19-28页 |
| 2．4．1 Humantistic approaches | 第21-23页 |
| 2．4．2 Implications of the humanist approach | 第23-24页 |
| 2．4．3 Social interactionism | 第24-27页 |
| 2．4．4 A social constructivist model | 第27页 |
| 2．4．5 A constructivist view of teaching | 第27-28页 |
| 2．5 General models of L2 learning relative to the research | 第28-32页 |
| 2．5．1The input hypothesis | 第29-31页 |
| 2．5．2 The affective filter hypothesis | 第31页 |
| 2．5．3 Social model: the social-education model | 第31-32页 |
| 2．5．4 Social learning theory | 第32页 |
| 2．6 Conclusion | 第32-33页 |
| 3 The Notion of Teacher Talk | 第33-48页 |
| 3．1 Definition of teacher talk | 第33-34页 |
| 3．2 Classifications of teacher talk | 第34-35页 |
| 3．3 The aspects of teacher talk | 第35-47页 |
| 3．3．1 How teacher modify their language | 第35-37页 |
| 3．3．2 Teachers' questions | 第37-39页 |
| 3．3．3 Feedback | 第39-46页 |
| 3．3．4 Teacher talking time | 第46-47页 |
| 3．4 Some ideas concerning teacher talk | 第47-48页 |
| 4 Application of the Research | 第48-62页 |
| 4．1 Key research questions for the study | 第48页 |
| 4．2 The ways to research | 第48-49页 |
| 4．3 Procedures | 第49页 |
| 4．4 Analysis of the research results and implications drawn | 第49-58页 |
| 4．4．1 Teacher talking time | 第49-50页 |
| 4．4．2 Questionnaire collection and analysis | 第50-53页 |
| 4．4．3 The nature of teacher talk | 第53-54页 |
| 4．4．4 Comparison and analysis of successful and unsuccessful teacher talk | 第54-58页 |
| 4．5 Suggestions for ESL teachers | 第58-60页 |
| 4．6 Some advice about input in the classroom | 第60-62页 |
| 5 Conclusion and Implications | 第62-67页 |
| 5．1 Conclusion | 第62-64页 |
| 5．2 Implication of language teachers | 第64-66页 |
| 5．3 Implication for future research | 第66-67页 |
| References | 第67-74页 |
| Appendix 1 | 第74-75页 |
