| Acknowledgements | 第1-7页 |
| Abstract | 第7-9页 |
| Chapter 1 Introduction | 第9-14页 |
| ·Rationale for the present study | 第9-11页 |
| ·Purpose of the study | 第11-12页 |
| ·Organization of the thesis | 第12页 |
| ·Abbreviations and definitions of terms | 第12-14页 |
| Chapter 2 Theoretical Foundations | 第14-26页 |
| ·Swale's CARS model | 第14-16页 |
| ·Halliday's concept of projection | 第16-18页 |
| ·General concept of evaluation | 第18-20页 |
| ·Martin's concept of evaluation | 第20-26页 |
| Chapter 3 Data Collection and Analysis | 第26-53页 |
| ·Introduction | 第26页 |
| ·Distribution of projections in RAIs | 第26-32页 |
| ·Classification of projections | 第32-36页 |
| ·Two important features of projections:projection verbs and that-clause | 第36-41页 |
| ·Evaluative functions of projections | 第41-53页 |
| Chapter 4 Conclusions | 第53-56页 |
| ·A summary of research findings | 第53-54页 |
| ·Research and pedagogic implications | 第54-55页 |
| ·Suggestions for further research | 第55-56页 |
| References | 第56-59页 |
| Appendix:Titles of research articles analyzed in the study | 第59-61页 |
| Resume | 第61页 |
