Chapter 1 Introduction 1.1 The Scope of This Study 1.2 Research Objectives 1.3 Research Questions 1.4 Research Hypothesis 1.5 Structure of the Book Chapter 2 An Overview of Cleft Sentences 2.1 Cleft Sentences in English 2.2 Cross-linguistic Perspectives on Cleft Sentences 2.3 Summary Chapter 3 Cleft Sentences in Chinese 3.1 Forms of Chinese Cleft Sentences 3.2 Classifications of Chinese "shi... de" Sentences 3.3 Semantic and Functional Properties of Chinese Cleft Sentences 3.4 The Syntactic and Functional Role of "shi" in Cleft Sentences 3.5 The Syntactic and Functional Role of "de" in Cleft Sentences 3.6 Summary Chapter 4 Theoretical Framework 4.1 Information Structure: An Overview 4.2 Focus Types and the Configuration of the Information Structure 4.3 Identifiability, Referentiality, and Definiteness 4.4 Identifiability and Activation in Discourse 4.5 Cognitive Perspective on Identifiability 4.6 Summary Chapter 5 Methodology and Data Collection 5.1 Data Source 5.2 Data Extraction 5.3 Criteria for Data Selection and Analysis 5.4 Classification and Sorting Procedure Chapter 6 Grammatical and Informational Interpretations of Cleft Foci 6.1 Focus Domains and Types of Focus Structures 6.2 Syntactic Categories of Focus Constituents 6.3 Grammatical Categories of Nominal Phrases in Focus Domains 6.4 Discussion and Summary Chapter 7 The Identifiability of the Focus and Topic Constituents in Chinese Cleft Sentences 7.1 The Distribution of Focus and Topic Constituents Across Identifiable Statuses 7.2 Identifiability of Focus and Topic Constituents in Argument-cleft Sentences 7.3 Identifiability of Focus and Topic Constituents in Adjunct-cleft Sentences 7.4 Grammatical Expressions and Their Identifiability Status 7.5 The Markedness of Chinese Cleft Sentences from the Perspective of Focus Typology 7.6 Summary Chapter 8 Conclusion 8.1 Chinese Cleft Sentences and Chinese "shi... de" Sentences 8.2 Types of Chinese Cleft Sentences and the Grammatical Categories of Focus/Topic Constituents 8.3 Identifiability of Focus and Topic Constituents 8.4 Theoretical and Practical Contribution 8.5 Limitations and Future Research Directions References In Memory of Professor Yan Huang