| Abstract (in Chinese) | 第4-6页 |
| Abstract (in English) | 第6-7页 |
| List of Abbreviations | 第9-12页 |
| Chapter One Introduction | 第12-16页 |
| 1.1 Research Background | 第12-13页 |
| 1.2 Research Significance | 第13-15页 |
| 1.2.1 The Theoretical Significance | 第13-14页 |
| 1.2.2 The Practical Significance | 第14-15页 |
| 1.3 Research Questions | 第15页 |
| 1.4 Organization of the Thesis | 第15-16页 |
| Chapter Two Literature Review | 第16-31页 |
| 2.1 Previous Studies on Lexical Chunks | 第16-26页 |
| 2.1.1 Basic Concepts of Lexical Chunks and Relevant Phrases | 第16-21页 |
| 2.1.2 Review of the Related Studies on Lexical Chunks | 第21-26页 |
| 2.2 Previous Studies on Scaffolding Instruction | 第26-29页 |
| 2.2.1 Overseas Studies of Scaffolding Instruction | 第26-27页 |
| 2.2.2 Domestic Studies of Scaffolding Instruction | 第27-29页 |
| 2.3 Research Gap | 第29-31页 |
| Chapter Three Research Design and Methodology | 第31-52页 |
| 3.1 Subjects | 第31-34页 |
| 3.2 Data Collection Instruments | 第34-37页 |
| 3.2.1 Oral Tests | 第34-37页 |
| 3.2.2 Exit Questionnaire | 第37页 |
| 3.3 Research Procedures | 第37页 |
| 3.4 Teaching Activities | 第37-52页 |
| 3.4.1 Teaching Activities in the Experimental Class | 第37-50页 |
| 3.4.2 Teaching Activities in the Control Class | 第50-52页 |
| Chapter Four Research Results and Discussion on the Effects ofScaffolding Lexical Chunk Approach on Oral Production | 第52-68页 |
| 4.1 Effects on the Amount of Students’ Lexical Chunks | 第54-59页 |
| 4.1.1 The Descriptive Statistics Analysis Result in Terms of the Amount of the LexicalChunks | 第54-55页 |
| 4.1.2 The Independent Sample T-test Result in Terms of the Amount of the LexicalChunks | 第55-58页 |
| 4.1.3 Discussion of the Effects on the Amount of the Students’ Lexical Chunks | 第58-59页 |
| 4.2 Effects on the Accuracy of Students’ Lexical Chunks | 第59-63页 |
| 4.2.1 The Descriptive Statistics Analysis Result in Terms of the Accuracy of theLexical Chunks | 第59-60页 |
| 4.2.2 The Independent Sample T-test Result in Terms of the Accuracy of the LexicalChunks | 第60-63页 |
| 4.2.3 Discussion of the Effects on the Accuracy of the Students’ Lexical Chunks | 第63页 |
| 4.3 Effects on the Variability of Students’ Lexical Chunks | 第63-68页 |
| 4.3.1 The Descriptive Statistics Analysis Result in Terms of the Variability of theLexical Chunks | 第64页 |
| 4.3.2 The Independent Sample T-test Result in Terms of the Variability of the LexicalChunks | 第64-67页 |
| 4.3.3 Discussion of the Effects on the Variability of the Students’ Lexical Chunks | 第67-68页 |
| Chapter Five Conclusion | 第68-75页 |
| 5.1 Major Findings | 第68-69页 |
| 5.2 Implications | 第69-72页 |
| 5.3 Limitations | 第72-75页 |
| Bibliography | 第75-78页 |
| Appendices | 第78-83页 |
| Acknowledgements | 第83-85页 |
| About the Author | 第85页 |
