| Acknowledgements | 第1-5页 |
| Abstract | 第5-7页 |
| 摘要 | 第7-10页 |
| Chapter 1 Introduction | 第10-13页 |
| ·Background of the research | 第10-11页 |
| ·Aim and significance of the research | 第11-12页 |
| ·Overview of the thesis | 第12-13页 |
| Chapter 2 Literature Review | 第13-23页 |
| ·Definitions of lexical chunks | 第13-14页 |
| ·Classification of lexical chunks | 第14-16页 |
| ·From the structural aspect | 第15-16页 |
| ·From the functional aspect | 第16页 |
| ·Roles of lexical chunks | 第16-20页 |
| ·Facilitating the fluency of language production | 第17-18页 |
| ·Facilitating the accuracy of language production | 第18页 |
| ·Facilitating the appropriateness of language production | 第18-19页 |
| ·Enhancing language processing capability | 第19-20页 |
| ·Previous research on lexical chunks | 第20-23页 |
| ·Overseas research on lexical chunks | 第20-21页 |
| ·Domestic research on lexical chunks | 第21-23页 |
| Chapter 3 Design and Methodology | 第23-38页 |
| ·Research questions | 第23页 |
| ·Research methods | 第23-26页 |
| ·Corpus -based approach | 第23-25页 |
| ·Quantitative method and qualitative method | 第25-26页 |
| ·Target materials | 第26页 |
| ·Software used in the research | 第26-27页 |
| ·The procedure of selecting lexical chunks | 第27-38页 |
| ·The principles of selecting lexical chunks | 第27-28页 |
| ·The process of making a word list | 第28-30页 |
| ·The use of software to withdraw word chunks | 第30-37页 |
| ·The selection of useful lexical chunks | 第37-38页 |
| Chapter 4 Results and Discussions | 第38-43页 |
| ·Findings of the features of lexical chunks used by non-English majors in their compositions | 第38-40页 |
| ·Findings of the influence of lexical chunk use on non-English majors' writing | 第40-41页 |
| ·Discussions about the findings | 第41-43页 |
| Chapter 5 Implications on English Teaching and Learning | 第43-51页 |
| ·Raising awareness of the lexical chunks | 第43-45页 |
| ·From the teachers' aspect | 第44页 |
| ·From the students' aspect | 第44-45页 |
| ·Increasing the input of lexical chunks | 第45-48页 |
| ·Doing exercises of identifying lexical chunks | 第45页 |
| ·Doing more reading and recitation | 第45-46页 |
| ·Classifying vocabulary in terms of lexical chunks | 第46页 |
| ·Accumulating useful lexical chunks for writing | 第46-48页 |
| ·Attaching great importance to the output of lexical chunks | 第48-51页 |
| ·Translating | 第48-49页 |
| ·Making sentences | 第49页 |
| ·Retelling | 第49页 |
| ·Interacting with others | 第49页 |
| ·Writing complete compositions with the suggested lexical chunks and frameworks | 第49-51页 |
| Chapter 6 Conclusion | 第51-53页 |
| ·Major findings | 第51页 |
| ·Limitations of the research | 第51-52页 |
| ·Suggestions for further research | 第52-53页 |
| References | 第53-57页 |
| Appendix | 第57-65页 |
| 攻读硕士学位期间科研成果 | 第65页 |
