| Abstract | 第4-5页 |
| 摘要 | 第6-10页 |
| CHAPTER ONE INTRODUCTION | 第10-14页 |
| 1.1 Background of the Study | 第10-11页 |
| 1.2 Aims and Significance of the Study | 第11-12页 |
| 1.3 Organization of the Thesis | 第12-14页 |
| CHAPTER TWO LITERATURE REVIEW | 第14-28页 |
| 2.1 Lexical Chunks | 第14-17页 |
| 2.1.1 Definition of lexical chunks | 第14-16页 |
| 2.1.2 Classification of lexical chunks | 第16-17页 |
| 2.2 Lexical Approach | 第17-19页 |
| 2.3 Previous Studies | 第19-28页 |
| 2.3.1 Studies abroad | 第19-22页 |
| 2.3.2 Studies at home | 第22-27页 |
| 2.3.3 Weaknesses of previous studies | 第27-28页 |
| CHAPTER THREE METHODOLOGY | 第28-36页 |
| 3.1 Research Questions | 第28-29页 |
| 3.2 Subjects | 第29页 |
| 3.3 Measurement of Lexical Chunks | 第29-31页 |
| 3.4 Research Procedure | 第31-34页 |
| 3.4.1 Pretest | 第31-32页 |
| 3.4.2 Teaching Experiment | 第32-34页 |
| 3.4.3 Posttest | 第34页 |
| 3.5 Data Collection and Analysis | 第34-36页 |
| CHAPTER FOUR RESULTS AND DISCUSSION | 第36-50页 |
| 4.1 The Number of Lexical Chunks in the Compositions | 第36-39页 |
| 4.1.1 The number of lexical chunks in the pretest of CG and EG | 第36页 |
| 4.1.2 The number of lexical chunks in the posttest of CG and EG | 第36-37页 |
| 4.1.3 Discussion | 第37-39页 |
| 4.2 The Use of Lexical Chunks in the Posttest Compositions of EG | 第39-45页 |
| 4.2.1 The number of the four types of lexical chunks in the high-scoring andlow-scoring posttest compositions of EG | 第39-40页 |
| 4.2.2 The frequently-occurring lexical chunks in the high-scoring and low-scoringposttest compositions of EG | 第40-42页 |
| 4.2.3 Lexical chunks expressing the same meaning in the high-scoring andlow-scoring posttest compositions of EG | 第42-44页 |
| 4.2.4 Discussion | 第44-45页 |
| 4.3 The Relationship between Lexical Approach and Writing Proficiency | 第45-50页 |
| 4.3.1 The writing scores of CG and EG in the posttest | 第46页 |
| 4.3.2 Correlation between lexical chunks and composition scores | 第46-47页 |
| 4.3.4 Discussion | 第47-50页 |
| CHAPTER FIVE CONCLUSION | 第50-53页 |
| 5.1 Major Findings | 第50页 |
| 5.2 Implications | 第50-51页 |
| 5.3 Limitations and Suggestions for Future Study | 第51-53页 |
| References | 第53-57页 |
| Appendices | 第57-67页 |
| Appendix 1 Pretest | 第57-58页 |
| Appendix 2 Posttest | 第58-59页 |
| Appendix 3 Scoring Principles and Standards | 第59-61页 |
| Appendix 4 The Number of Lexical Chunks in the Pretest and Posttest | 第61-63页 |
| Appendix 5 The Number of the Four Types of Lexical Chunks in the Posttest of EG | 第63-65页 |
| Appendix 6 The Writing Scores of the Pretest and Posttest | 第65-67页 |
| 攻读学位期间取得的研究成果 | 第67-68页 |
| Acknowledegements | 第68页 |
