Discovering Language: The Structure of Modern English This book introduces the levels model of language, which enables students to learn about the smallest linguistic items (sounds) and work through the subsequent levels (morphology and syntax) until the sentence is reached. Many introductory books address the structural issues considered here, but they also usually include contextual and theoretical discussions that are dealt with in the other volumes in this series. As a result there is enough room to include a chapter on the basic lexical semantics without which the rest of the levels of language would not work.