The document explores the concepts of competence and performance in language, defining deep and surface structures along with generative morphology models by Halle and Aronoff. It critiques Halle's model, addressing issues with its components such as morpheme lists, unrestricted word formation rules, and the role of the dictionary, while proposing an alternative word-based morphology framework. Additionally, it discusses the mechanisms of word formation, readjustment, truncation, and allomorphy rules in language.