| Acknowledgements | 第1-8页 |
| Abstract （Chinese） | 第8-10页 |
| Abstract （English） | 第10-14页 |
| Chapter Ⅰ Power, Discourse and Legal Discourse | 第14-29页 |
| 1． Views on Power | 第14-19页 |
| 1．1 Ancient Views on Power | 第14-15页 |
| 1．2 Concepts of Power in the Twentieth Century | 第15-19页 |
| 1．3 Summary of Power | 第19页 |
| 2． Basic Concept of Discourse | 第19-22页 |
| 2．1 Linguistic Sense of Discourse | 第19-20页 |
| 2．2 The Social Sense of Discourse | 第20-21页 |
| 2．3 The Relationship Between the Two Senses of Discourse | 第21-22页 |
| 3． The Relationship between Power and Discourse | 第22-24页 |
| 4． Legal Discourse | 第24-29页 |
| 4．1 Law and Language | 第24-26页 |
| 4．2 General Tendency of the Contemporary Discourse Study | 第26页 |
| 4．3 New Approaches to Legal Discourse | 第26-27页 |
| 4．4 The Reason of Choosing Cross-examination as Data | 第27-29页 |
| Chapter Ⅱ Turn-taking Organization and Linguistic Features of Cross-examination | 第29-52页 |
| 1． Turn-taking | 第29-35页 |
| 1．1 Turn-taking Organization for Conversation | 第29-31页 |
| 1．2 Turn-taking Organization for Cross-examination | 第31-32页 |
| 1．3 The Difference and Consequences That the Pre-Allocation System for Cross-examination Makes | 第32-35页 |
| 2． The Strategies used by Lawyers in Cross-examination | 第35-51页 |
| 2．1 Silence | 第35-39页 |
| 2．2 Question Form | 第39-42页 |
| 2．3 Topic Management | 第42-45页 |
| 2．4 Commentary | 第45-48页 |
| 2．5 The Witness's Capacity for Knowledge | 第48-51页 |
| 3． Turn-taking Organization and Lawyer's Strategies over Witness | 第51-52页 |
| Chapter Ⅲ Modality Analysis of Discourse of Cross-examination | 第52-71页 |
| 1． Interpersonal Metafunction and Modality | 第52-54页 |
| 2． Introduction to Modality System in Systemic Functional Grammar | 第54-60页 |
| 2．1 Modalization and Modulation | 第54-56页 |
| 2．2 Metaphors of Modality and System of Orientations | 第56-58页 |
| 2．3 Value of Modality | 第58-59页 |
| 2．4 Summary of Modality System | 第59-60页 |
| 3． Sample Analysis of Modality System in Cross-examination | 第60-71页 |
| 3．1 Cross-examination Concerning O． J． Simpson Trial | 第60-61页 |
| 3．2 Results of the Analysis | 第61-65页 |
| 3．2．1 Analysis of Utterances by the Lawyer | 第62-63页 |
| 3．2．2 Analysis of Utterances by the Witness | 第63-65页 |
| 3．2．3 Statistic Results of Analysis of Utterances by the Lawyer and the Witness | 第65页 |
| 3．3 Discussion of the Results | 第65-70页 |
| 3．3．1 Metaphorical Modality system | 第66-67页 |
| 3．3．2 Non-Metaphorical Modality System | 第67-68页 |
| 3．3．3 Inner-sentence Modality Accumulation | 第68-69页 |
| 3．3．4 Inter-sentence Modality Accumulation | 第69-70页 |
| 3．4 Summary of the Modality Analysis | 第70-71页 |
| Chapter Ⅳ Conclusion | 第71-74页 |
| Appendix | 第74-82页 |
| Bibliography | 第82-84页 |
