| Abstract | 第1-7页 |
| 摘要 | 第7-9页 |
| Contents | 第9-14页 |
| 目录 | 第14-18页 |
| List of abbreviations | 第18-19页 |
| List of figures and tables | 第19-21页 |
| Chapter 1 Introduction | 第21-40页 |
| ·What is evidentiality | 第21-28页 |
| ·Background of the study | 第28-33页 |
| ·Objectives and significances of the current research | 第33-34页 |
| ·Methodology and data collection | 第34-37页 |
| ·Organization of the dissertation | 第37-40页 |
| Chapter 2 Literature review | 第40-66页 |
| ·Approaches to evidentiality | 第40-52页 |
| ·The typological and cross-linguistic approach | 第40-46页 |
| ·The cognitive approach | 第46-47页 |
| ·The pragmatic approach | 第47-50页 |
| ·Systemic Functional Linguistics approach | 第50-51页 |
| ·Other approaches to evidentiality | 第51-52页 |
| ·Previous researches on RAs | 第52-56页 |
| ·Characteristics and limitations of the previous researches on evidentiality and RAs | 第56-62页 |
| ·Understanding evidentiality in the current research | 第62-65页 |
| ·Summary | 第65-66页 |
| Chapter 3 Theoretical framework | 第66-103页 |
| ·SFL | 第66-82页 |
| ·Language as social-semiotic and meaning potential | 第67页 |
| ·Three metafunctions | 第67-68页 |
| ·Strata and realization | 第68-70页 |
| ·Evidentiality in transitivity system | 第70-72页 |
| ·Evidentiality and modality system in SFL | 第72-75页 |
| ·Evidentiality and grammatical metaphor | 第75-78页 |
| ·The appraisal theory | 第78-81页 |
| ·The cognitive approach to language in SFL | 第81-82页 |
| ·Genre | 第82-86页 |
| ·Genre in SFL | 第82-83页 |
| ·Swale's and Bhatia's notions of genre | 第83-86页 |
| ·Epistemological stance | 第86-87页 |
| ·Metadiscourse | 第87-91页 |
| ·A three-element model of interpersonal functions of evidentiality in RAs | 第91-99页 |
| ·RAs as a persuasive and interactive genre | 第92-93页 |
| ·Defining the three-element model | 第93-99页 |
| ·Analytical framework in the current research | 第99-101页 |
| ·Summary | 第101-103页 |
| Chapter 4 Classification and distributions of evidentiality in RAs | 第103-139页 |
| ·Classifications of evidentiality | 第103-113页 |
| ·Previous classifications of evidentiality | 第104-108页 |
| ·Classification of evidentiality in the current study | 第108-113页 |
| ·Lexicogrammatical realizations of evidentiality in RAs | 第113-126页 |
| ·Identification of evidentials in the data | 第113-116页 |
| ·Lexicogrammatical realizations of evidential types | 第116-126页 |
| ·Distribution patterns of evidential types in RAs | 第126-130页 |
| ·The frequencies of evidential types | 第126-127页 |
| ·Distribution of evidentials in different evidential types | 第127-130页 |
| ·Evidentiality and generic structure of RAs | 第130-138页 |
| ·The generic structure of RAs | 第130-132页 |
| ·Relationship between evidential types and generic structure of RAs | 第132-138页 |
| ·Summary | 第138-139页 |
| Chapter 5 Evidential choice and interpersonal functions of evidentiality in RAs | 第139-220页 |
| ·Evidentiality as evaluation | 第139-178页 |
| ·Evaluative functions of reporting evidentials | 第140-155页 |
| ·Evidentiality and modal responsibility in RAs | 第155-164页 |
| ·Evidentiality and dialogism | 第164-178页 |
| ·Evidentiality as metadiscourse | 第178-194页 |
| ·The interpersonal nature of metadiscourse | 第179-180页 |
| ·Evidentiality as textual metadiscourse | 第180-183页 |
| ·Evidentiality as interpersonal metadiscourse | 第183-193页 |
| ·Summary of evidentiality as metadiscourse | 第193-194页 |
| ·Evidentiality as writer identity indexing | 第194-207页 |
| ·Evidentiality and the writer's credibility | 第195-201页 |
| ·Evidentiality and the balance between writer's authority and solidarity | 第201-204页 |
| ·Evidentiality and writer's respect and responsibility | 第204-207页 |
| ·A comparative study of evidentiality in RAs | 第207-218页 |
| ·The necessity of a comparative study | 第207-209页 |
| ·Findings of the comparative study | 第209-216页 |
| ·Pedagogical implications | 第216-218页 |
| ·Summary | 第218-220页 |
| Chapter 6 Conclusion | 第220-227页 |
| ·Findings of the current study | 第220-223页 |
| ·Significance of the current study | 第223-225页 |
| ·Limitations and suggestions for future research | 第225-227页 |
| Appendix 1 Data sources | 第227-230页 |
| Appendix 2 Data-coding samples | 第230-241页 |
| Appendix 3 Evidentials investigated in the current research | 第241-242页 |
| Appendix 4 Sample of concordance of reporting evidential show | 第242-243页 |
| Bibliography | 第243-260页 |
| Acknowledgements | 第260-261页 |
