| 摘要 | 第1-5页 |
| Abstract | 第5-9页 |
| 1 Introduction | 第9-15页 |
| ·Research background | 第9-10页 |
| ·Significance of the present study | 第10-13页 |
| ·Research topic and general research questions | 第13-14页 |
| ·Outline of the thesis | 第14-15页 |
| 2 Literature Review | 第15-29页 |
| ·Definition of lexical chunks | 第15-18页 |
| ·Various definitions of lexical chunks | 第15-18页 |
| ·Features of Lexical Chunks | 第18页 |
| ·Classification of Lexical Chunks | 第18-22页 |
| ·Major views on lexical chunks’classification | 第18-21页 |
| ·The categories used in the present study | 第21-22页 |
| ·Functions of lexical chunks | 第22-24页 |
| ·Related studies of lexical chunks | 第24-29页 |
| 3 Method | 第29-34页 |
| ·Design of the study | 第29页 |
| ·Subjects | 第29-32页 |
| ·Instruments | 第32页 |
| ·Procedure | 第32-34页 |
| 4 Results and Discussions | 第34-45页 |
| ·Strong correlation between proper use of lexical chunk and English writing performance | 第34-35页 |
| ·Different relationships between each structural category of lexical chunks and writing quality | 第35-39页 |
| ·Strong and positive effect of lexical approach on writing performance | 第39-41页 |
| ·Different effects of lexical approach on fluency and accuracy | 第41-45页 |
| 5 Pedagogical Implications of lexical Approach | 第45-54页 |
| ·Facilitating the written output | 第45-48页 |
| ·Enhancing the fluency of written output | 第48-49页 |
| ·Enhancing the accuracy of written output | 第49-51页 |
| ·Supporting the development and internalization of syntactic rules | 第51-54页 |
| 6 Conclusions | 第54-58页 |
| ·Major findings of the present study | 第54-55页 |
| ·Limitations of the present study | 第55-56页 |
| ·Suggestions for further study | 第56-58页 |
| References | 第58-64页 |
| Appendices | 第64-81页 |
| Acknowledgements | 第81页 |
