声明
摘要
ABSTRACT
Contents
Chapter 1 Introduction
1.1 Research Background
1.2 Research Objective
1.3 Significance of the Study
1.4 Layout of the Thesis
Chapter 2 Literature Review
2.1 Variationist Sociolinguistics
2.1.1 Introduction
2.1.2 Representative Studies
2.1.3 Key Concepts
2.1.4 Methods
2.2 English Modals
2.2.1 Definition of English Modals
2.2.2 Modality of must and have to
2.3 Previous Empirical studies
2.3.1 Non-sociolinguistic Studies
2.3.3 Sociolinguistic Studies
2.4 Summary
Chapter 3 Research Methodology
3.1 Corpus-based Approach
3.2 Corpus Used
3.3 Data Collection and Analysis
3.3.1 Tools Used for Data Collection and Analysis
3.3.2 Procedures for Data Collection and Analysis
Chapter 4 Results and Discussion
4.1 Linguistic Factors for the Choice of must and have to
4.1.1 Overall Results for Linguistic Variables
4.1.2 Detailed Analysis across Linguistic Variables
4.1.3 Distinctive Collexeme Analysis
4.1.4 Discussion
4.2 Sociolinguistic Factors for the Choice of must and have to
4.2.1 Overall Results for Social Variables
4.2.2 Detailed Analysis across Age
4.2.3 Crosstab Analysis across Age
4.2.4 Discussion
Chapter 5 Conclusion
5.1 Major Findings of the Study
5.2 Implications
5.3 Limitations and Suggestions
References
Appendices
Acknowledgments