| Abstract | 第1-7页 |
| 摘要 | 第7-8页 |
| Table of Content | 第8-11页 |
| List of Abbreviations | 第11-12页 |
| List of Figures | 第12-13页 |
| List of Tables | 第13-14页 |
| Chapter I. Introduction | 第14-18页 |
| ·Significance and background of the study | 第14-16页 |
| ·Purpose of the research | 第16页 |
| ·Framework of the thesis | 第16-18页 |
| Chapter II. Literature Review | 第18-30页 |
| ·Definitions and classifications | 第18-24页 |
| ·Definitions of discourse | 第18页 |
| ·Definitions of cohesion | 第18-19页 |
| ·The Relationship between cohesion and coherence | 第19-20页 |
| ·Classifications of lexical cohesion | 第20-24页 |
| ·Researches on Lexical Cohesion | 第24-27页 |
| ·Theoretical researches on lexical cohesion | 第24-25页 |
| ·Empirical researches in writing | 第25-27页 |
| ·Contrastive inter-language Analysis (CIA) | 第27-30页 |
| Chapter III. Research Methodology | 第30-41页 |
| ·Research questions | 第30页 |
| ·Corpora involved | 第30-34页 |
| ·The SWECCL 2.0 | 第30-32页 |
| ·The LONCNESS | 第32页 |
| ·The sub-corpus description | 第32-34页 |
| ·Software used | 第34-37页 |
| ·Sub-corpus generator | 第34-35页 |
| ·AntConc 3.2.4 | 第35-36页 |
| ·SPSS | 第36-37页 |
| ·Research Procedures | 第37-39页 |
| ·Sub-corpus generating | 第37页 |
| ·Data tagging | 第37-38页 |
| ·Word list generating and manual filtering | 第38-39页 |
| ·Data processing and analyzing | 第39-41页 |
| Chapter IV. Results and Discussion | 第41-64页 |
| ·General distribution of six subtypes of lexical cohesions in WECCL | 第41-42页 |
| ·Contrastive analysis of lexical cohesions between WECCL and LOCNESS | 第42-55页 |
| ·Contrastive analysis of lexical cohesions with different distribution | 第42-44页 |
| ·Contrastive analysis of lexical cohesions in each subtype | 第44-55页 |
| ·The difference of SR, SN and HP between WECCL and LOCNESS | 第46-52页 |
| ·The similarities of CR, AN and GL between WECCL and LOCNESS | 第52-55页 |
| ·The across-grade developmental trends of six subtype of lexical cohesion in WECCL | 第55-64页 |
| ·General description of the three grades | 第55-56页 |
| ·General distribution of lexical cohesions in three grades | 第56-58页 |
| ·The developmental pattern of six subtypes of lexical cohesions | 第58-64页 |
| ·Simple repetition and complex repetition | 第59-60页 |
| ·Synonym and antonym | 第60-62页 |
| ·Hyponym and general word | 第62-64页 |
| Chapter V. Conclusion | 第64-68页 |
| ·Summary of the major findings | 第64-65页 |
| ·Pedagogical implications | 第65-66页 |
| ·Limitations and suggestions for further studies | 第66-68页 |
| Appendix I: An example of WECCL samples | 第68-69页 |
| Appendix II An example of LOCNESS samples | 第69-70页 |
| Bibliography | 第70-74页 |
| Acknowledgements | 第74-75页 |
| Papers Published during MA Program | 第75-76页 |
