| ABSTRACT | 第1-6页 |
| 摘要 | 第6-11页 |
| Chapter One Introduction | 第11-16页 |
| ·Background to the present study | 第11-14页 |
| ·The present situation of college students’English writing performance | 第11-12页 |
| ·Major causes of college students’poor writing performance | 第12-14页 |
| ·The significance of the present study | 第14页 |
| ·The organization of the present thesis | 第14-16页 |
| Chapter Two Review of the Lexical Approach | 第16-29页 |
| ·A general description of the Lexical Approach | 第16-20页 |
| ·The historical development of the Lexical Approach | 第17-19页 |
| ·Key principles of the Lexical Approach | 第19-20页 |
| ·Lexical chunks | 第20-26页 |
| ·Definitions of lexical chunks | 第21-22页 |
| ·Classifications of lexical chunks | 第22-24页 |
| ·Functions of lexical chunks | 第24-26页 |
| ·The Lexical Approach and writing | 第26-28页 |
| ·Teaching approaches to writing | 第26-27页 |
| ·Lexical chunks and writing | 第27-28页 |
| ·Summary | 第28-29页 |
| Chapter Three Research Design | 第29-37页 |
| ·Research questions | 第29页 |
| ·Hypotheses | 第29-30页 |
| ·Subjects | 第30页 |
| ·Experimental procedures | 第30-37页 |
| ·Pre-test | 第30-31页 |
| ·Teaching activities | 第31-35页 |
| ·Post-test | 第35-36页 |
| ·Data collection | 第36-37页 |
| Chapter Four Results and Discussion | 第37-46页 |
| ·Statistical description of the writing scores | 第37-39页 |
| ·Statistical description of the number of lexical chunks used in writing | 第39-43页 |
| ·Statistical description of appropriateness of lexical chunks used in writing | 第43-44页 |
| ·Statistical description of the effects that the LA produces on grammaticity in writing | 第44-45页 |
| ·Summary | 第45-46页 |
| Chapter Five Conclusion | 第46-51页 |
| ·Major findings | 第46-48页 |
| ·Pedagogical implications | 第48-49页 |
| ·Limitations and suggestions for future research | 第49-51页 |
| References | 第51-55页 |
| Acknowledgements | 第55-56页 |
| Appendix I | 第56-57页 |
| Appendix II | 第57-59页 |
| Appendix III | 第59-61页 |
| Publications | 第61页 |
