| Acknowledgements | 第1-4页 |
| English Abstract | 第4-6页 |
| Chinese Abstract | 第6-8页 |
| Contents | 第8-11页 |
| A List of Tables | 第11-22页 |
| Chapter 1 Introduction | 第22-27页 |
| ·Research Background | 第22-25页 |
| ·Research Objective | 第25-26页 |
| ·General Organization | 第26-27页 |
| Chapter 2 Literature Review | 第27-59页 |
| ·Definition of Lexical Chunks | 第27-28页 |
| ·Classification of Lexical Chunks | 第28-31页 |
| ·The Organizing Role of Lexical Chunks | 第31-38页 |
| ·Macro-organizers | 第31-35页 |
| ·The Signaling Function in Transactional Discourse | 第31-32页 |
| ·Co-ordination and Subordination Macro-organizers | 第32-34页 |
| ·Processing Strategies: Top-down and Bottom-up | 第34-35页 |
| ·Micro-organizers | 第35-38页 |
| ·Macro/Micro Distinctions | 第36-37页 |
| ·Macro/Micro Forms and Functions | 第37-38页 |
| ·Pragmatics and Discourse Functions of Lexical Chunks | 第38-48页 |
| ·Lexical Chunks and Indirect Speech Acts | 第38-42页 |
| ·Conventional and Non-Conventional Indirect Speech Acts | 第39-40页 |
| ·Lexical Chunk Frames and Conventional Indirect Speech Acts | 第40-42页 |
| ·Pragmatics Functions of Lexical Chunks in Spoken Discourse | 第42-47页 |
| ·Lexical Chunks in Written Discourse | 第47-48页 |
| ·Lexical Chunks in Language Acquisition | 第48-54页 |
| ·Lexical Chunks as the Basis of Language | 第48-51页 |
| ·Overcoming Processing Constraints | 第51-52页 |
| ·Lexical Chunks as a Harmonious Balance | 第52-53页 |
| ·Grammaticalized Lexis, not Lexicalized Grammar | 第53-54页 |
| ·Related Studies of Lexical Chunks | 第54-59页 |
| ·Early Work in the Field | 第54-56页 |
| ·Recent Work in the Field | 第56-59页 |
| Chapter 3 Empirical Research Design | 第59-65页 |
| ·Questions and Hypotheses | 第59页 |
| ·Participants | 第59-60页 |
| ·Instruments | 第60-61页 |
| ·Procedure of the Experiment | 第61页 |
| ·Treatment Conditions | 第61-63页 |
| ·Data Collection | 第63页 |
| ·Data Analysis | 第63-65页 |
| Chapter 4 Research Results | 第65-71页 |
| ·The Results of the General Scores of the Four Tests | 第65-66页 |
| ·The Results of the Four Tests Respectively | 第66-71页 |
| ·The Results of Test 1 | 第67-68页 |
| ·The Results of Test 2 | 第68-69页 |
| ·The Results of Test 3 | 第69-70页 |
| ·The Results of Test 4 | 第70-71页 |
| Chapter 5 Analysis and Discussion | 第71-77页 |
| ·The Relationship between Lexical Chunks and the Quality of EFL Learners' Language Output | 第71页 |
| ·The Relationship between Different Types of Lexical Chunks and the Quality of EFL Learners' Language Output | 第71-77页 |
| ·Have All the Four Kinds of Lexical Chunks the Same Effect on the Quality of EFL Learners' Language Output? | 第71-72页 |
| ·What Effect Do They Have Respectively? And Why? | 第72-77页 |
| Chapter 6 A Longitudinal Study | 第77-79页 |
| ·Exercises | 第77页 |
| ·A Writing Test | 第77-78页 |
| ·An Interview | 第78-79页 |
| Chapter 7 Conclusions and Implications | 第79-82页 |
| ·Conclusions | 第79页 |
| ·Implications | 第79-82页 |
| ·The Need for Further Empirical Research | 第80页 |
| ·Pedagogical Implications in Teaching Practice | 第80-82页 |
| Appendix Ⅰ | 第82-83页 |
| Appendix Ⅱ | 第83-88页 |
| Appendix Ⅲ | 第88-92页 |
| Bibliography | 第92-96页 |
| 原创性声明 | 第96页 |
| 关于学位论文使用授权的声明 | 第96页 |
