| 摘要 | 第1-7页 |
| Abstract | 第7-12页 |
| 1 Introduction | 第12-18页 |
| ·Research orientation | 第12页 |
| ·Significance of the present study | 第12-14页 |
| ·Rationale of the present study | 第14-16页 |
| ·Research questions | 第16-17页 |
| ·Outline of the dissertation | 第17-18页 |
| 2 Literature Review | 第18-33页 |
| ·Tense and aspect | 第18-20页 |
| ·Lexical aspect | 第20-27页 |
| ·The concept of lexical aspect and its classification | 第20-21页 |
| ·The Aspect Hypothesis and its related studies | 第21-27页 |
| ·Narrative structure | 第27-33页 |
| ·Grounding | 第27-30页 |
| ·The Discourse Hypothesis and its related studies | 第30-33页 |
| 3 Methodology | 第33-44页 |
| ·Data description | 第33-36页 |
| ·Data coding | 第36-42页 |
| ·Coding the dependent variables | 第38-39页 |
| ·Coding the independent variables | 第39-42页 |
| ·Data analysis | 第42-44页 |
| ·Some statistical methods of SPSS | 第42页 |
| ·Z-test | 第42-44页 |
| 4 Results | 第44-61页 |
| ·Analysis of the present perfect variation | 第44-48页 |
| ·Analysis of the individual effects of lexical aspect and narrative structure | 第48-54页 |
| ·Lexical aspect and the present perfect variation | 第48-51页 |
| ·Narrative structure and the present perfect variation | 第51-54页 |
| ·Analysis of the interactive effects of lexical aspect and narrative structure | 第54-61页 |
| 5 Discussion | 第61-72页 |
| ·The individual effects of these two linguistic factors on the present perfect variation | 第61-69页 |
| ·Lexical aspect | 第61-66页 |
| ·Narrative structure | 第66-69页 |
| ·The interactive effects of lexical aspect and narrative structure | 第69-72页 |
| 6 Conclusion | 第72-78页 |
| ·Summary of major findings | 第72-75页 |
| ·The general view of the present perfect use in the present study | 第72-73页 |
| ·The individual effects of lexical aspect and narrative structure on the present perfect variation | 第73-74页 |
| ·The interactive effect of lexical aspect and narrative structure on the present perfect variation | 第74-75页 |
| ·Implications | 第75-76页 |
| ·Theoretical implications | 第75页 |
| ·Pedagogical implications | 第75-76页 |
| ·Limitations | 第76页 |
| ·Suggestions for future research | 第76-78页 |
| Acknowledgements | 第78-79页 |
| References | 第79-82页 |
