| Abstract | 第3-4页 |
| 中文摘要 | 第5-9页 |
| Chapter 1 Introduction | 第9-14页 |
| 1.1 Research background | 第9-10页 |
| 1.2 Research significance | 第10-11页 |
| 1.3 Research methodology | 第11-12页 |
| 1.4 General organization of the thesis | 第12-14页 |
| Chapter 2 Literature Review | 第14-29页 |
| 2.1 Introduction | 第14页 |
| 2.2 The introduction of reported speech | 第14-21页 |
| 2.2.1 Previous studies on reported speech | 第14-18页 |
| 2.2.2 The definition and classification of reported speech | 第18-21页 |
| 2.3 Public speech and TED speeches | 第21-28页 |
| 2.3.1 Previous studies on public speech | 第21-24页 |
| 2.3.2 The definition and classification of public speech | 第24-25页 |
| 2.3.3 The introduction of TED speeches | 第25-28页 |
| 2.4 Summary | 第28-29页 |
| Chapter 3 Theoretical Framework | 第29-46页 |
| 3.1 Theoretical foundations of the voicing values | 第29-30页 |
| 3.2 Dialogism and Heteroglossia | 第30-32页 |
| 3.3 The subsystem of engagement | 第32-44页 |
| 3.3.1 Monogloss and Heterogloss | 第35-37页 |
| 3.3.2 Dialogic Expansion vs. Dialogic Contraction | 第37-41页 |
| 3.3.3 Extra-vocalization vs. Intra-vocalization | 第41-44页 |
| 3.4 A proposed model for the present study | 第44-45页 |
| 3.5 Summary | 第45-46页 |
| Chapter 4 The Voicing Values of Reported Speech | 第46-67页 |
| 4.1. The notions and identity of the voice | 第46-49页 |
| 4.1.1 The notions of the voice | 第46-47页 |
| 4.1.2 The identity of the voice in discourse | 第47-49页 |
| 4.2 The voicing values of reported speech in TED speeches | 第49-60页 |
| 4.2.1 Descriptive analysis of the engagement resources | 第50-52页 |
| 4.2.2 The evaluative functioning of direct speech | 第52-57页 |
| 4.2.3 The dynamic interaction of indirect speech | 第57-58页 |
| 4.2.4 The engagement of integrated speech and inserted speech | 第58-60页 |
| 4.3 Engagement and the construction of writer-reader interaction | 第60-66页 |
| 4.3.1 Dialogic expansion and writer-reader interaction | 第61-63页 |
| 4.3.2 Dialogic contraction and writer-reader interaction | 第63-66页 |
| 4.4 Summary | 第66-67页 |
| Chapter 5 Conclusions | 第67-69页 |
| 5.1 Major findings of the present study | 第67页 |
| 5.2 Major contributions of the present study | 第67-68页 |
| 5.3 Limitations of the present study | 第68页 |
| 5.4 Suggestions for the future study | 第68-69页 |
| Bibliography | 第69-76页 |
| Acknowledgements | 第76-77页 |
