| Abstract (Chinese) | 第1-3页 |
| Abstract (English) | 第3-5页 |
| 1. Preliminaries | 第5-8页 |
| ·Object of research | 第5-6页 |
| ·Literature review | 第6-7页 |
| ·Purpose and significance | 第7-8页 |
| 2. Description of English and Chinese empty categories | 第8-25页 |
| ·Description of English empty categories | 第8-15页 |
| ·DP trace in English language | 第8-10页 |
| ·English DP trace in passivization | 第8-9页 |
| ·English DP trace in raising process | 第9-10页 |
| ·PRO in English | 第10-13页 |
| ·Wh-trace in English | 第13-15页 |
| ·Description of empty categories in Chinese | 第15-25页 |
| ·DP trace in Chinese | 第16-18页 |
| ·PRO in Chinese | 第18-20页 |
| ·Wh-trace in Chinese | 第20-24页 |
| ·pro in Chinese | 第24-25页 |
| 3. Comparison of empty categories in English and Chinese | 第25-55页 |
| ·Similarities of ECs between the two languages | 第25-32页 |
| ·Typological similarities | 第25-26页 |
| ·Analysis of the similarities | 第26-32页 |
| ·Differences between English and Chinese in terms ECs | 第32-55页 |
| ·Differences between English and Chinese in terms of wh-trace | 第32-47页 |
| ·Differences between English and Chinese in terms of pro | 第47-49页 |
| ·Hypothesis of topic projection | 第49-55页 |
| 4. Conclusion | 第55-56页 |
| Acknowledgement | 第56-57页 |
| References | 第57-60页 |
| Notes | 第60页 |
