| ABSTRACT | 第1-6页 |
| 摘要 | 第6-10页 |
| CHAPTER ONE INTRODUCTION | 第10-12页 |
| ·BACKGROUND OF THE RESEARCH | 第10页 |
| ·THE SIGNIFICANCE OF THE STUDY | 第10-11页 |
| ·LAYOUT OF THE STUDY | 第11-12页 |
| CHAPTER TWO LITERATURE REVIEW | 第12-28页 |
| ·THEORETICAL FRAMEWORK | 第12-23页 |
| ·Definition of interlanguage variation | 第12-14页 |
| ·Definition of interlanguage variability | 第14-15页 |
| ·Horizontal variability and vertical variability | 第15-16页 |
| ·Systematic and non-systematic variability | 第16-18页 |
| ·Systematic variability | 第16-17页 |
| ·Non-systematic variability | 第17-18页 |
| ·The Definition of bilingualism | 第18-21页 |
| ·Definition based on competence | 第18-19页 |
| ·Definition based on function | 第19-20页 |
| ·Definition based on attitudes | 第20-21页 |
| ·Different aspects of bilingualism | 第21-22页 |
| ·Morphological inflection | 第22-23页 |
| ·STUDIES ON INTERLANGUAGE VARIABILITY AT HOME AND ABROAD | 第23-28页 |
| CHAPTER THREE RESEARCH METHODS | 第28-33页 |
| 3. CASE STUDIES BASED ON CORPUS | 第28-33页 |
| ·Subjects | 第28-30页 |
| ·The data | 第30-31页 |
| ·The feature examined | 第31-32页 |
| ·Procedure | 第32-33页 |
| CHAPTER FOUR RESEARCH RESULTS | 第33-43页 |
| ·THIRD PERSON –S | 第33-38页 |
| ·THIRD PERSON COPULA | 第38-43页 |
| CHAPTER FIVE DISCUSSION | 第43-55页 |
| ·HOW DOES LINGUISTIC ENVIRONMENT AFFECT ACQUISITION OF THE TWOGRAMMATICAL STRUCTURES OVER TIME? | 第43-45页 |
| ·DO SOME LINGUISTIC CONTEXTS FAVOR TARGET-LIKE PERFORMANCE ON A GIVENVARIANT? | 第45-46页 |
| ·HOW DO THE CHILDREN AT A YEAR AND HALF PRESENT CERTAIN SYSTEMATICVARIATIONS IN THEIR UTTERANCES? | 第46页 |
| ·WHAT KINDS OF DEVELOPMENT PATTERN DO CHILDREN FOLLOW AT THE EARLYACQUISITION STAGES? | 第46-55页 |
| CHAPTER SIX CONCLUSION | 第55-58页 |
| ·MAJOR FINDINGS | 第55-56页 |
| ·IMPLICATIONS AND FURTHER QUESTIONS | 第56-58页 |
| BIBLIOGRAPHY | 第58-64页 |
| Acknowledgements | 第64页 |
