Unit 1 Language Defined Unit 2 Language and ThoutUnit 3 Properties of Language Unit 4 The Origin of Language Unit 5 What Is Linguistics Unit 6 The Object of Linguistics Unit 7 Nature of the Linguistic Sign Unit 8 Some Basic Concepts in Linguistics Unit 9 Phonology Unit 10 Phonetic Distinctive Features Unit 11 Form and Meaning in Natural Languages Unit 12 Semantics and Semantic Theory Unit 13 Pragmatics Unit 14 Psycholinguistics Unit 15 Artificial intelligence and computer modeling 参考