| English Abstract | 第1-4页 |
| Chinese Abstract | 第4-5页 |
| Acknowlegements | 第5-8页 |
| Chapter Ⅰ Introduction | 第8-10页 |
| Chapter Ⅱ LiteratureReview | 第10-34页 |
| ·Definition | 第10-11页 |
| ·The origin of the study of ambiguity language | 第11-13页 |
| ·The basic contents of the study of ambiguity language | 第13-16页 |
| ·Ambiguity language speech and hedges | 第16-17页 |
| ·The study of ambiguity in semantics | 第17-18页 |
| ·Psychological factors of ambiguity language production | 第18-23页 |
| ·Motivation analysis of ambiguity language production | 第23-34页 |
| Chapter Ⅲ Task-Based Language Learning and Teaching | 第34-39页 |
| ·Definition | 第34-36页 |
| ·The principles of task-based language teaching method | 第36-39页 |
| ·Teachers functioning as leaders and students as principal part | 第36-37页 |
| ·The conception of actual life trend | 第37页 |
| ·The principle of democratic harmony | 第37-38页 |
| ·The principle of cooperation | 第38-39页 |
| Chapter Ⅳ Data Collection and Analysis Procedures | 第39-43页 |
| ·Data collection | 第39-41页 |
| ·Pertinence analysis | 第41-43页 |
| Chapter Ⅴ Learning and Teaching Strategies | 第43-57页 |
| ·Socio-affective strategies | 第46页 |
| ·Cognitive strategies | 第46-48页 |
| ·Metacognitive strategies | 第48-49页 |
| ·Communication strategies | 第49-50页 |
| ·Factors influencing strategy choice | 第50-51页 |
| ·Good language learners | 第51-54页 |
| ·Language awareness cognitive strategies | 第54-55页 |
| ·Emotional intelligence in teacher training | 第55-57页 |
| Chapter Ⅵ Conclusion | 第57-58页 |
| Bibliography | 第58-59页 |
