| ABSTRACT | 第1-13页 |
| 中文摘要 | 第13-19页 |
| LIST OF ABBREVIATIONS | 第19-21页 |
| LIST OF TABLES | 第21-22页 |
| ChapterⅠINTRODUCTION | 第22-27页 |
| Chapter ⅡLITERATURE REVIEW | 第27-44页 |
| ·ESP genre analysis | 第27-29页 |
| ·Tense studies in ESP genre analysis | 第29-31页 |
| ·Previous tense studies in medical RAs | 第31-40页 |
| ·Tense studies of medical RAs at section and move Levels | 第31-35页 |
| ·Tense studies in abstract section | 第31-33页 |
| ·Tense studies in IMRD sections respectively | 第33-35页 |
| ·Tense studies on complete medical RAs | 第35-37页 |
| ·Studies on functions of the three most frequently used tenses | 第37-40页 |
| ·C ontrastive analysis | 第40-42页 |
| ·Definition and implications of contrastive analysis | 第40-41页 |
| ·Tense studies in contrastive analysis | 第41-42页 |
| ·Summary | 第42-44页 |
| Chapter ⅢMETHODOLOGY | 第44-54页 |
| ·Research design | 第44页 |
| ·Pretests | 第44-45页 |
| ·Establishment of the two main corpora | 第45-51页 |
| ·Selection of journals for main corpora | 第45-49页 |
| ·Selection of sample RAs for main corpora | 第49-51页 |
| ·Data collection and analysis | 第51-54页 |
| ·Move identification | 第51-52页 |
| ·Verb tenses count and analysis | 第52-54页 |
| Chapter Ⅳ RESULTS AND DISCUSSION | 第54-70页 |
| ·Tenses found in sample RAs in CMW and NMW | 第54-55页 |
| ·Tenses occurrence frequencies at section-levels in CMW and NMW | 第55-58页 |
| ·Tenses occurrence frequencies at move-leves in CMW and NMW | 第58-63页 |
| ·Most frequently used verb tenses in two main corpora | 第63-70页 |
| Chapter ⅤCONCLUSION | 第70-74页 |
| ·Major findings | 第70-72页 |
| ·Pedagogical implications | 第72-73页 |
| ·Limitations and further research | 第73-74页 |
| BIBLIOGRAPHY | 第74-81页 |
| NOTES AND QUOTATIONS | 第81-83页 |
| APPENDIX | 第83-87页 |
| CURRICULUM VITAE AND PUBLICATIONS | 第87-88页 |
| ACKNOWLEDGEMENTS | 第88页 |
