| Abstract | 第7页 |
| 摘要 | 第8-9页 |
| Acknowledgments | 第9-12页 |
| Chapter 1 Introduction | 第12-18页 |
| 1.1 Research Background | 第12-15页 |
| 1.1.1 The Background of Foreign Language Teaching | 第12-13页 |
| 1.1.2 Problems in Foreign Language Writing | 第13-15页 |
| 1.2 The Purpose of the Study | 第15-16页 |
| 1.3 The Significance of the Study | 第16页 |
| 1.4 The Structure of the thesis | 第16-18页 |
| Chapter 2 Literature Review | 第18-33页 |
| 2.1 Lexical Chunks | 第18-27页 |
| 2.1.1 Definitions of Lexical Chunks | 第18-19页 |
| 2.1.2 Features of Lexical Chunks | 第19-21页 |
| 2.1.3 Classifications of Lexical Chunks | 第21-26页 |
| 2.1.4 Functions of Lexical Chunks | 第26-27页 |
| 2.2 Lexical Approach | 第27-29页 |
| 2.2.1 Nattinger & DeCarrico's Lexical Approach | 第27-28页 |
| 2.2.2 Lewis'Lexical Approach | 第28-29页 |
| 2.3 Previous Studies of Lexical Chunks at Home and Abroad | 第29-33页 |
| 2.3.1 Relevant Studies Abroad | 第29-30页 |
| 2.3.2 Relevant Studies in China | 第30-33页 |
| Chapter 3 Theoretical Bases of Lexical Approaches to English teaching | 第33-37页 |
| 3.1 Krashen's Input Theory | 第33-35页 |
| 3.2 Robert M.Gagne's Information Processing and learning theory | 第35-37页 |
| Chapter 4 Experiment Design | 第37-45页 |
| 4.1 Research Questions and Hypothesis | 第37-38页 |
| 4.2 Participants of the Study | 第38页 |
| 4.3 Instruments of the Study | 第38-39页 |
| 4.4 Teaching Procedures | 第39-44页 |
| 4.4.1 Teaching Procedures in Experimental Class | 第39-43页 |
| 4.4.2 Teaching Procedures in Control Class | 第43-44页 |
| 4.5 Data Collection | 第44-45页 |
| Chapter 5 Data Analysis and Discussion | 第45-52页 |
| 5.1 Statistic Description and Analysis of Writing Scores | 第45-48页 |
| 5.2 Statistic Description and Analysis of the Number of Lexical Chunks | 第48-50页 |
| 5.3 Discussion | 第50-52页 |
| Chapter 6 Conclusion | 第52-57页 |
| 6.1 Major Findings | 第52-53页 |
| 6.2 Pedagogical Implications | 第53-55页 |
| 6.3 Limitations of the Study | 第55-56页 |
| 6.4 Suggestions for Further Studies | 第56-57页 |
| References | 第57-60页 |
| AppendixⅠ Writing Test in Pretest | 第60-61页 |
| AppendixⅡ Writing Test in Posttest | 第61-62页 |
| AppendixⅢ Students' Writing Scores in the Pretest and Posttest | 第62-64页 |
| AppendixⅣ The Number of Lexical Chunks Students Used in the Pretest andPosttest | 第64-65页 |
