| INTRODUCTION | 第1-14页 |
| CHAPTER ONE A REVIEW OF THE LITERATURE | 第14-39页 |
| ·DEFINING TASKS | 第14-20页 |
| ·The emergence of the term 'task' | 第14-16页 |
| ·Definitions of tasks | 第16-18页 |
| ·Different stages of a classroom task | 第18-20页 |
| ·THE ROLE OF TEACHER IN SECOND LANGUAGE ACQUISITION | 第20-25页 |
| ·Comprehensible input and the role of the teacher | 第20-22页 |
| ·Interface position and the role of the teacher | 第22-25页 |
| ·INTERACTION IN TASK AND SECOND LANGUAGE ACQUISITION | 第25-37页 |
| ·The importance of task-based interaction | 第25-29页 |
| ·The nature of teacher talk in interaction | 第29-32页 |
| ·Effects of task-based negotiation on learners' output | 第32-37页 |
| ·SUMMARY AND RESEARCH QUESTIONS | 第37-39页 |
| CHAPTER TWO DESIGN AND METHODOLOGY | 第39-44页 |
| ·DESIGN THE EXPERIMENTAL TASK | 第39-41页 |
| ·Stretch fluency or construct knowledge | 第39页 |
| ·Approach to explore the teacher role | 第39-41页 |
| ·THE SUBJECTS AND THE TEACHER | 第41页 |
| ·INSTRUMENT | 第41页 |
| ·PROCEDURE OF THE EXPERIMENT | 第41-44页 |
| CHAPTER THREE FINDINGS AND ANALYSIS | 第44-57页 |
| ·PRE-FOCUS | 第44-45页 |
| ·LANGUAGE FORM FOCUS | 第45-52页 |
| ·POST-FOCUS | 第52-57页 |
| CHAPTER FOUR CONCLUSIONS AND SUGGESTIONS | 第57-61页 |
| ·CONCLUSIONS | 第57-58页 |
| ·SUGGESTIONS FOR TASK IMPLEMENTATION | 第58-61页 |
| BIBLIOGRAPHY | 第61-68页 |
| 中文摘要 | 第68-71页 |
