| 摘要 | 第6-8页 |
| Abstract | 第8-10页 |
| Chapter One Introduction | 第15-23页 |
| 1.1 Background of the Study | 第15-19页 |
| 1.2 Objectives and Significance of the Study | 第19-21页 |
| 1.3 Layout of the Study | 第21-23页 |
| Chapter Two Literature Review | 第23-50页 |
| 2.1 An Introduction to IF-counterfactual Conditionals | 第23-32页 |
| 2.1.1 Definition of IF-counterfactual Conditionals | 第23-25页 |
| 2.1.2 Classifications of English IF-counterfactual Conditionals | 第25-32页 |
| 2.2 An Overview of Theories Used in the Thesis | 第32-38页 |
| 2.2.1 An Overview of Conceptual Blending Theory | 第33-36页 |
| 2.2.2 Dual Representation Argument on Counterfactual Conditionals | 第36-38页 |
| 2.3 Relevant Studies on Counterfactual Conditionals | 第38-44页 |
| 2.3.1 Theoretical Research on IF-counterfactuals | 第38-41页 |
| 2.3.2 Experimental Studies on Counterfactual Conditionals | 第41-44页 |
| 2.4 Event-Related Potentials (ERPs) | 第44-47页 |
| 2.4.1 Advantages of Event-Related Potentials (ERPs) | 第44-46页 |
| 2.4.2 Major ERP Components | 第46-47页 |
| 2.5 Summary | 第47-50页 |
| Chapter Three Methodology | 第50-58页 |
| 3.1 Research Questions | 第50页 |
| 3.2 ERP Experiment | 第50-56页 |
| 3.2.1 Participants | 第51页 |
| 3.2.2 Materials | 第51-52页 |
| 3.2.3 Instruments | 第52-55页 |
| 3.2.4 Procedure | 第55-56页 |
| 3.3 Data Recording | 第56-58页 |
| Chapter Four Results and Discussion | 第58-97页 |
| 4.1 Behavioral Data | 第58-65页 |
| 4.2 ERP Data | 第65-84页 |
| 4.2.1 Comparison of Counterfatcual Conditionals and Factual Conditionals in L2 HigherProficient Group | 第66-71页 |
| 4.2.2 Comparison of Counterfactual Conditionals and Factual Conditionals in L2 LowProficient Group | 第71-75页 |
| 4.2.3 Comparison of Counterfactual Conditionals between L2 High Proficient Group VSL2 Low Proficient Group | 第75-78页 |
| 4.2.4 Comparison of Factual Conditionals between L2 High Proficient Group VS L2 LowProficient Group | 第78-80页 |
| 4.2.5 ERP Analyses of Factuality and Language Proficiency in Four Time Windows | 第80-83页 |
| 4.2.6 ERP Analyses of Peak Latency of N400 of Counterfactual Conditionals and FactualConditionals in Two Groups | 第83-84页 |
| 4.3 Discussion | 第84-97页 |
| 4.3.1 Effects of Factuality or Type of Sentence on Counterfactual Conditionals | 第84-91页 |
| 4.3.2 Effects of Language Proficiency on Counterfactual Conditionals | 第91-94页 |
| 4.3.3 Interaction Effect of Factuality and Language Proficiency | 第94页 |
| 4.3.4 Dual Representation of Counterfactual Conditionals Explained by ConceptualBlending Theory | 第94-97页 |
| Chapter Five Conclusion | 第97-101页 |
| 5.1 Major Findings | 第97-98页 |
| 5.2 Innovations and Implications | 第98-100页 |
| 5.2.1 Innovations | 第98-99页 |
| 5.2.2 Implications | 第99-100页 |
| 5.3 Limitations and Suggestions | 第100-101页 |
| References | 第101-108页 |
| Appendices | 第108-148页 |
| Appendix A Questionnaire of Judgement of New Words Acceptance | 第108-116页 |
| Appendix B Value of Judgment of New Words Acceptance | 第116-122页 |
| Appendix C Value for Critical Words | 第122-131页 |
| Appendix D Questionnaire of Grammatical Judgment of Counterfactuals | 第131-132页 |
| Appendix E Questionnaire of Grammatical Judgment of Factual Conditionals | 第132-133页 |
| Appendix F Value of Grammatical Judgment of Counterfactual Conditionals | 第133-138页 |
| Appendix G Value of Grammatical Judgment of Factual Conditionals | 第138-142页 |
| Appendix H Comprehension of Counterfactual Conditionals | 第142-148页 |
| Acknowledgements | 第148页 |
