| Acknowledgements | 第6-7页 |
| 摘要 | 第7-8页 |
| Abstract | 第8页 |
| Chapter One Introduction | 第13-19页 |
| 1.1 Background of Research | 第13-16页 |
| 1.2 Purposes of Research | 第16页 |
| 1.3 Significance of Research | 第16-18页 |
| 1.4 Organization of the Thesis | 第18-19页 |
| Chapter Two Literature Review | 第19-32页 |
| 2.1 The Present Perfect & The Simple Past | 第19-25页 |
| 2.1.1 Tense & Aspect | 第19-20页 |
| 2.1.2 The Present Perfect | 第20-22页 |
| 2.1.3 The Simple Past Tense | 第22-23页 |
| 2.1.4 Relationship Between The Present Perfect and The Simple Past Tense | 第23-25页 |
| 2.1.4.1 Differences Between The Present Perfect and The Simple Past Tense | 第23-24页 |
| 2.1.4.2 Competition Between The Present Perfect and The Simple Past Tense | 第24-25页 |
| 2.2 Register | 第25-29页 |
| 2.2.1 The Definition of Register | 第25-26页 |
| 2.2.2 Register as a Predicator of Linguistic Variation | 第26-27页 |
| 2.2.3 Register Analysis Framework | 第27-29页 |
| 2.3 Corpus Linguistic | 第29-31页 |
| 2.3.1 Corpus | 第29-30页 |
| 2.3.2 A Review of Corpus-related Studies | 第30-31页 |
| 2.4 Summary of the Literature Review | 第31-32页 |
| Chapter Three Research Methods | 第32-43页 |
| 3.1 Research Material:COCA | 第32-33页 |
| 3.2 Research Instruments and Statistical Methods | 第33-37页 |
| 3.2.1 Research Instruments:Excel | 第33-36页 |
| 3.2.2 Statistical Methods | 第36-37页 |
| 3.2.2.1 Linear Regression Analysis | 第36页 |
| 3.2.2.2 Correlation Analysis | 第36-37页 |
| 3.3 Research Procedures | 第37-43页 |
| 3.3.1 Data Retrieval | 第37-39页 |
| 3.3.2 Data Analysis | 第39-41页 |
| 3.3.3 Data Interpretation | 第41-43页 |
| Chapter Four Results | 第43-56页 |
| 4.1 General Distribution Patterns of the PP/SP in Different Registers | 第43-46页 |
| 4.1.1 General Distribution Patterns of the PP in Different Registers | 第43-44页 |
| 4.1.2 General Distribution Patterns of the SP in Different Registers | 第44-45页 |
| 4.1.3 Relative Distribution Patterns of the PP and the SP in Different Registers | 第45-46页 |
| 4.2 Relationship Between the Development of the PP and the SP Across Registers | 第46-56页 |
| 4.2.1 Relationship Between the PP and the SP in the Corpus | 第46-47页 |
| 4.2.2 Relationship Between the Development of the PP and the SP in Spoken Register | 第47-49页 |
| 4.2.3 Relationship Between the Development of the PP and the SP in Fiction | 第49-51页 |
| 4.2.4 Relationship Between the Development of PP and the SP in the Magazine Register | 第51-52页 |
| 4.2.5 Relationship Between the Development of the PP and the SP in Newspaper | 第52-53页 |
| 4.2.6 Relationship Between the Development of the PP and the SP in Academic | 第53-55页 |
| 4.2.7 Summary of the Results | 第55-56页 |
| Chapter Five Discussion | 第56-67页 |
| 5.1 Discussion | 第56-67页 |
| 5.1.1 Competition between the PP and the SP | 第56-57页 |
| 5.1.2 Variations across Registers | 第57-67页 |
| 5.1.2.1 Spoken Register | 第58-60页 |
| 5.1.2.2 Fiction Register | 第60-61页 |
| 5.1.2.3 Magazine Register | 第61-63页 |
| 5.1.2.4 Newspaper Register | 第63-64页 |
| 5.1.2.5 Academic Register | 第64-67页 |
| Chapter Six Conclusion | 第67-70页 |
| 6.1 Conclusion of the Study | 第67-69页 |
| 6.2 Limitations and Suggestions | 第69-70页 |
| References | 第70-75页 |
| Appendices | 第75-81页 |
| Appendix Ⅰ | 第75-78页 |
| Appendix Ⅱ | 第78-81页 |
| Appendix Ⅲ | 第81页 |
