| 摘要 | 第1-6页 |
| Abstract | 第6-9页 |
| 1 Introduction | 第9-13页 |
| ·Research background of the study | 第9-11页 |
| ·Purpose and significance of the study | 第11页 |
| ·Organization of the thesis | 第11-13页 |
| 2 Literature Review | 第13-29页 |
| ·Definitions of lexical chunks | 第13-16页 |
| ·Classification of lexical chunks | 第16-20页 |
| ·Functions of lexical chunks | 第20-23页 |
| ·Related empirical studies on lexical chunks | 第23-25页 |
| ·Teaching approaches applying lexical chunks | 第25-29页 |
| ·Lewis’ lexical approach | 第25-27页 |
| ·Nattinger & DeCarrico’s teaching approach | 第27页 |
| ·Summary | 第27-29页 |
| 3 Methodology | 第29-31页 |
| ·Research questions | 第29页 |
| ·Subjects | 第29页 |
| ·Instruments | 第29-30页 |
| ·Procedures | 第30-31页 |
| 4 Results and Discussions | 第31-36页 |
| ·Overall features of lexical chunk used in prepared speeches | 第31页 |
| ·Overall features of lexical chunks used in impromptu speeches | 第31-32页 |
| ·Comparison of the features of lexical chunk used in prepared and impromptu speeche | 第32页 |
| ·The diversity of the lexical chunks | 第32-34页 |
| ·Discussion | 第34-36页 |
| ·Overuse certain types of lexical chunks | 第34页 |
| ·Colloquial expressions | 第34页 |
| ·Lack of diversity | 第34-36页 |
| 5 Pedagogical Implications | 第36-43页 |
| ·Necessity of applying lexical chunks in foreign language teaching | 第36-39页 |
| ·Lexical chunk teaching strategies | 第39-41页 |
| ·Changing teachers’mindset in teaching | 第39-40页 |
| ·Teaching lexical chunks in contexts | 第40-41页 |
| ·Raising learners’awareness of lexical chunks | 第41页 |
| ·Combination of the chunk-based teaching approach and other approaches | 第41-43页 |
| 6 Conclusion | 第43-45页 |
| ·Major findings | 第43页 |
| ·Limitations of the study | 第43-44页 |
| ·Further suggestions for the study | 第44-45页 |
| References | 第45-48页 |
| Acknowledgements | 第48-49页 |
| Appendix | 第49-60页 |
