| Abstract in Chinese | 第1-8页 |
| Abstract in English | 第8-15页 |
| Chapter one Introduction | 第15-21页 |
| ·Research background | 第15-16页 |
| ·Significance of the Study | 第16-19页 |
| ·The organization of the paper | 第19-21页 |
| Chapter Two Literature Review | 第21-40页 |
| ·Definition and Typology of Language Attrition | 第21-23页 |
| ·Main Theoretical Framework of Language Attrition | 第23-28页 |
| ·Psycholinguistic Approach | 第24-25页 |
| ·Linguistic Approach | 第25-27页 |
| ·Regression Hypothesis | 第25-26页 |
| ·Linguistic Feature Hypotheses | 第26-27页 |
| ·Sociolinguistic Approach | 第27-28页 |
| ·Relevant Variables in Language Attrition | 第28-32页 |
| ·The Studies on English Passive Voice | 第32-40页 |
| ·The Definition of Passive voice in the view of contrastive study | 第33-35页 |
| ·The Definition of Passive voice in the view of cognitive study | 第35-38页 |
| ·The similarities and differences between English and Chinese Prototypical passives | 第36-37页 |
| ·The similarities and differences between English and Chinese non-Prototypical passives | 第37-38页 |
| ·The Classification of English passive voice structure in this study | 第38页 |
| ·Markedness and Frequency of passive voice in English and Chinese | 第38-40页 |
| Chapter Three Research Methodology | 第40-46页 |
| ·An Overview of the Research Design | 第40页 |
| ·Method Used in This Study | 第40-41页 |
| ·Subjects | 第41-42页 |
| ·The Initial Sample | 第42页 |
| ·The Final Sample | 第42页 |
| ·Research Questions | 第42-43页 |
| ·Instrument | 第43-44页 |
| ·Instrument for Investigation into the attrition of passive voice structures | 第43-44页 |
| ·Instrument for Measurement of Language Proficiency | 第44页 |
| ·Data Collection and Analysis Procedure | 第44-46页 |
| Chapter Four Results and Discussion | 第46-62页 |
| ·Data analysis | 第46-52页 |
| ·Almost all the participants suffer attrition on passive voice structures | 第46-48页 |
| ·Participants got higher scores in prototypical passives than those of non-prototypical passives at stage 1 | 第48-49页 |
| ·No significant difference in two different passives on attrition | 第49-51页 |
| ·Higher proficiency less resistant to attrition | 第51-52页 |
| ·Discussion | 第52-62页 |
| ·Language attrition after three months’summer vacation | 第52-56页 |
| ·Exposure to target language | 第53页 |
| ·Interlanguage hypothesis | 第53-54页 |
| ·Linguistic feature hypothesis | 第54-56页 |
| ·Why did the prototypical passives suffer more attrition than those of non-prototypical passives? | 第56-58页 |
| ·What is the relationship between language attrition and language proficiency? | 第58-62页 |
| ·No correlation between proficiency and prototypical passives | 第59-60页 |
| ·High proficiency with high attrition on non-prototypical passive | 第60-62页 |
| Chapter Five Conclusion | 第62-67页 |
| ·Major findings | 第62页 |
| ·Implications | 第62-64页 |
| ·Theoretical implication | 第62-63页 |
| ·Practical implications | 第63-64页 |
| ·Foreign language teaching method | 第63-64页 |
| ·Foreign language education program and economics | 第64页 |
| ·Limitations | 第64-66页 |
| ·Limitation in the subjects | 第65页 |
| ·Limitation in the instruments | 第65-66页 |
| ·Limitation in time | 第66页 |
| ·Recommendations for further research | 第66-67页 |
| Bibliography | 第67-72页 |
| Acknowledgements | 第72-73页 |
| Appendix | 第73-75页 |
| 个人简历 | 第75页 |
| 攻读硕士期间发表论文 | 第75页 |
