| 摘要 | 第1-5页 |
| Abstract | 第5-9页 |
| Chapter 1 Introduction | 第9-13页 |
| ·The Background of the Present Study | 第9-11页 |
| ·The Purpose of the Present Study | 第11页 |
| ·The Outline of the Present Study | 第11-13页 |
| Chapter 2 Literature Review | 第13-30页 |
| ·Lexical Phrases | 第13-22页 |
| ·The Formulaic Nature of Language | 第13-14页 |
| ·The Definition of Lexical Phrase | 第14-16页 |
| ·Working Definition of Lexical Phrases in Present Study | 第16-17页 |
| ·The Classification of Lexical Phrases | 第17-20页 |
| ·The Functions of Lexical Phrases | 第20-22页 |
| ·Theories on Language Processing | 第22-26页 |
| ·Rule-based System and Exemplar-based System | 第22-23页 |
| ·Open-choice Principle and Idiom Principle | 第23-24页 |
| ·Output Hypothesis | 第24-26页 |
| ·Studies of Lexical Phrases Both Home and Abroad | 第26-28页 |
| ·The Features of the Present Study | 第28-30页 |
| Chapter 3 Research Methodology | 第30-37页 |
| ·The Introduction of the Sample Corpus in the Present Study | 第30-31页 |
| ·The Research Questions in the Present Study | 第31-32页 |
| ·The Tools for Lexical Phrases Extraction | 第32-33页 |
| ·The Process of Lexical Phrases Extraction | 第33-35页 |
| ·The Process of Counting Use Frequency of Lexical Phrases in Each Subject | 第35-36页 |
| ·Data Analysis | 第36-37页 |
| Chapter 4 Results and Discussion | 第37-48页 |
| ·Results | 第37-40页 |
| ·Independent T-test between Advanced Learners Group and Less Advanced Learners Group | 第37-39页 |
| ·Test for Several Samples for Different Tasks | 第39-40页 |
| ·Discussion of the Results | 第40-42页 |
| ·Discussion of the First Research Question | 第40-41页 |
| ·Discussion of the Second Research Question | 第41-42页 |
| ·The General Characteristics of Lexical Phrases | 第42-48页 |
| ·Overuse of Some Lexical Phrases | 第42-45页 |
| ·The Under-use of Some Lexical Phrases | 第45-46页 |
| ·The Misuse of Some Lexical Phrases | 第46页 |
| ·The Lack of Lexical Phrase Competence | 第46-48页 |
| Chapter 5 Conclusions and Implications | 第48-58页 |
| ·The Major Findings in the Present Study | 第48-49页 |
| ·Some Pedagogical Implications | 第49-56页 |
| ·The Importance of Lexical Approach | 第49-50页 |
| ·The Importance of Lexical Phrases in EFL | 第50-52页 |
| ·The Ways to Integrate Lexical Phrases into Classroom | 第52-54页 |
| ·Suggested Classroom Activities for Lexical Phrases Teaching | 第54-56页 |
| ·The Limitations of Present Study | 第56页 |
| ·Recommendations for Further Study | 第56-58页 |
| Bibliography | 第58-62页 |
| Appendix | 第62-76页 |
| Appendix One： Some Examples of Target Lexical Phrases | 第62-68页 |
| Appendix Two： Detailed Example about Lexical Phrases Use in 02-100-08 | 第68-69页 |
| Appendix Three： Detailed Information about the Use Frequency of Lexical Phrasein Each Subject | 第69-76页 |
| Acknowledgments | 第76-77页 |
| 在读期间公开发表论文（著）及科研情况 | 第77页 |
