| 1 Introduction | 第1-12页 |
| ·A Brief Review of Studies on Modality | 第7-9页 |
| ·Research Purpose and Hypothesis | 第9-10页 |
| ·Methodology | 第10-12页 |
| 2 Theoretical Background | 第12-22页 |
| ·Language as a Semiotic System | 第12-14页 |
| ·Metafunctions of Language | 第14页 |
| ·Modality | 第14-19页 |
| ·Definitions of Modality | 第14-15页 |
| ·Functional Viewpoint on Modality | 第15-19页 |
| ·Linguistic Realizations of Modality | 第19-22页 |
| 3 The Genre of English Academic Book Reviews | 第22-25页 |
| ·Structure of Academic Book Reviews | 第22-23页 |
| ·Nature of Academic Book Reviews | 第23-25页 |
| 4 Research Findings | 第25-33页 |
| ·Frequencies of Modal Expressions | 第25-28页 |
| ·Distribution of Modal Expressions | 第28-29页 |
| ·Frequencies of Various Modal Expressions in Each Section | 第29-31页 |
| ·Co-occurrence of Modal Expressions | 第31-32页 |
| ·Summary | 第32-33页 |
| 5 Discussion of Roles of Modality in Academic Book Reviews | 第33-47页 |
| ·Modality as Politeness Strategy | 第33-40页 |
| ·Modals of Probability | 第34-36页 |
| ·Expressions of Possibility | 第36-37页 |
| ·Expressions of Certainty | 第37页 |
| ·Metaphors of Modality | 第37-39页 |
| ·Comment Adjuncts | 第39页 |
| ·Modals of Obligation | 第39-40页 |
| ·Modality as Interactional Strategy | 第40-42页 |
| ·Modality as Metadiscoursal Strategy | 第42-46页 |
| ·Summary | 第46-47页 |
| 6 Conclusion | 第47-49页 |
| Acknowledgements | 第49-50页 |
| Bibliography | 第50-54页 |
| Article Published | 第54页 |
