A corpus-based research on present perfect use and multiple linguistic factors = 语言因素对现在完...

　　Chapter 1 Introduction/1
　　 1.1 Introduction/1
　　 1.2 Motivation/1
　　 1.3 Significance of the present study/3
　　 1.4 Research questions/5
　　 1.5 Outline of the book/6
　　Chapter 2 Curpus linguistics and inter'language studies/8
　　 2.1 Corpus linguistics/8
　　 2.2 Interlanguage/15
　　 2.3 Learner corpora/20
　　Chapter 3 Tense and aspect acquisition and I inguisticfactor,s/27
　　 3.1 Tense and aspect/27
　　 3.2 The Present Perfect in English/29
　　 3.3 Linguistic factors affecting tense/aspect acquisition/30
　　Chapter 4 Methodology/54
　　 4.1 Introduction/54
　　 4.2 Data description/54
　　 4.3 Data coding/56
　　Chapter 5 Results/69
　　 5.1 Introduction/69
　　 5.2 Analysis of tense/aspect errors/69
　　 5.3 Analysis of the present perfect variation/77
　　 5.4 Effects of linguistic factors on present perfect variation/83
　　Chapter 6 Discussion/122
　　 6.1 Semantic interpretation of the present perfect variation/122
　　 6.2 The effects of linguistic factors on the present perfect variation/125
　　Chapter 7 Conclusion/157
　　 7.1 Summary of major findings/157
　　 7.2 Implications/165
　　 7.3 Suggestions for future research/168
　　Appendix 1 A sample text from CLEC/169
　　Appendix 2 Sampled data from tagged VP6 errors on English tense/aspect/170
　　Appendix 3 Sampled data from the subjects' use of present perfect/175
　　Appendix 4 Sampled diagnostic tests for lexical aspect/177
　　Bibliography/179