Chapter 1 The impairment of interlanguage
1.1 Debate on the Impairment of Interlange Syntax
1.2 Research Question and Singnificance
Chapter 2 Previous Studies and Theories of Infiectionl Optionlity
2.1 Inflectional Optionality
2.2 Root Infinitives in L1 Grammars
2.3 Inflectional Optionality in L2 Grammars
2.4 Problems with the Previous Studies
2.5 Improvements in the Present Study
Chapter 3 The Theoretical Framework
3.1 The Grammars Model of the Minimalist Program
3.2 Ceoos-Linguistic Varation
3.3 Functionai Categories
3.4 Festures and Feature Checking Theory
3.5 Finiteness in English and Chinese
Chapter 4 The Empirical Study
4.1 Hypothses
4.2 The Case Study
4.3 The Cross-Sectional Study
4.4 Acpuisiyion of the Suppletive
4.5 Theoretial Account
Chapter 5 Causes of Missing Inflection in L2
5.1 Testing the Previous Accounts
5.2 Other Factors Affecting Inflection Suppliance in L2
5.3 Morphological Competence
Chapter 6 Concluding Remarks
Appendix ⅠTest Used in Cross-Sectional Study
Appendix Ⅱ Exampie of the Overuse of the Suppletive Be The Case study
Appendix Ⅲ Verbs with Regular Inflection in the Case Study
Appendix Ⅳ Agreement Errors in the Cross-Sectional Study
References