声明
Acknowledgements
摘要
Abstract
Contents
List of Figures
List of Tables
Chapter One Introduction
1.1 Background of Research
1.2 Objectives of Research
1.3 Significance of Research
1.4 Organization of the Thesis
Chapter Two Literature Review
2.1 Aspect
2.1.1 Situation Aspect and Viewpoint Aspect
2.1.2 Perlect and Perfective
2.1.3 Aspect and Tense
2.2 Perfect
2.2.1 Present perfect
2.2.2 Past perfect
2.2.3 Nonfinite perfect
2.3 Corpus Linguistics
2.3.1 Brown Corpus,LOB Corpus,Frown Corpus and F-LOB Corpus
2.3.2 DCPSE
2.3.3 ARCHER
2.3.4 COCA
2.4 Language Changing Trend Patterns and Explanations
2.5 Previous Studies in English Aspect Changes
2.6 Sub-registers Used for Analyzing Language Change
2.7 Summary
Chapter Three Research Methodology and Data Collection
3.1 Research Material:COCA
3.2 Research Instruments
3.2.1 Research Instruments:Excel
3.2.2 Research Instruments:Stata
3.3 Research Procedures and Results
3.3.1 Research Design
3.3.2 Data Retrieval and Processing on Year Basis
3.3.3 Data Retrieval and Processing on Register Basis
3.3.4 Data Analysis Procedure
Chapter Four Results and Discussion
4.1 Diachronic Analysis of the Changes in the Past Two Decades
4.2 Chi-squared Goodness of Fit Tests:Is There Change?
4.2.1 Chi-squared Goodness of Fit Tests Explained
4.2.2 Chi-squared Goodness of Fit Tests:First year(1990)and Last Year(2012)
4.2.3 Chi-squared Goodness of Fit Tests:Five Year Periods
4.2.4 Summary
4.3 Time Series Analysis
4.3.1 Linear Regression Analysis
4.3.2 Smoothing Technique
4.3.3 Structural Change
4.3.4 Summary
4.4 Changing Trend in Different Registers
4.4.1 Difference in the Use of the Perfect Construction across Registers
4.4.2 Spoken Register
4.4.3 Fiction Register
4.4.4 Magazine Register
4.4.5 Newspaper Register
4.4.6 Academic Register
4.4.7 Summary of Changing Trend in Different Registers
4.5 Interpretation of the Changing Trend in Different Registers
Chapter Five Conclusion
5.1 Summary of Research Findings
5.2 Limitation of the Study
References
Appendix Ⅰ
Appendix Ⅱ
Appendix Ⅲ
Appendix Ⅳ
Appendix Ⅴ
Appendix Ⅵ
Appendix Ⅶ
Appendix Ⅷ
Appendix Ⅸ
Appendix Ⅹ Present Perfect Construction(Register)