| Abstract | 第1-6页 |
| 摘要 | 第6-9页 |
| Chapter One Introduction | 第9-12页 |
| ·Research background | 第9-10页 |
| ·Purpose and significance of the study | 第10-11页 |
| ·Outline of the thesis | 第11-12页 |
| Chapter Two Literature Review | 第12-22页 |
| ·Different views on the role of Input | 第12-14页 |
| ·Krashen's Input hypothesis | 第14-16页 |
| ·Relevant research on enhancing students' language proficiency by increasing input | 第16-22页 |
| ·Relevant research aboard | 第16-18页 |
| ·Relevant research in China | 第18-22页 |
| Chapter Three Research Design and Methodology | 第22-28页 |
| ·Research questions | 第22页 |
| ·Subjects | 第22-23页 |
| ·Experiment Subjects | 第22-23页 |
| ·Interview subjects | 第23页 |
| ·Instruments | 第23-25页 |
| ·Questionnaire | 第23-24页 |
| ·Interview | 第24页 |
| ·Oral English test | 第24-25页 |
| ·Procedures of the Experiment | 第25-26页 |
| ·Data collection and Analysis | 第26-28页 |
| Chapter Four Results and Discussion | 第28-42页 |
| ·Results of Research Question 1: Can students' oral English communicative competence be improved when they are provided with a large amount of comprehensible input? | 第28-35页 |
| ·Results of Pre-test scores | 第28-29页 |
| ·Results between Pre-test and Post-test of each class | 第29-32页 |
| ·Results of Post-test scores for CC and EC students | 第32-33页 |
| ·Discussion | 第33-35页 |
| ·Results of Research Question 2：What are the students' attitudes towards therole of input in the second language learning, especially in oral English learning? | 第35-42页 |
| ·Analysis of the questionnaire | 第35-39页 |
| ·Analyses of the Interview | 第39-42页 |
| Chapter Five Conclusion and Implications | 第42-47页 |
| ·Major findings of the study | 第42-43页 |
| ·Implications for Oral English teaching and learning | 第43-45页 |
| ·Improving the Quantities of Language Input | 第43页 |
| ·Improving the Qualities of Language Input | 第43-44页 |
| ·Overcoming the Affective Factors obstructing Oral English learning | 第44-45页 |
| ·Limitations and suggestions for future studies | 第45-47页 |
| Reference | 第47-50页 |
| Appendix A | 第50-52页 |
| Appendix B | 第52-54页 |
| Acknowledgments | 第54-55页 |
| 在读期间公开发表论文（著）及科研情况 | 第55页 |
