1. The document outlines various theories and approaches to describing language, including classical/traditional grammar, structural linguistics, transformational generative grammar, functional/notional grammar, register analysis, discourse analysis, and text-diagramming.
2. It notes that traditional grammar provides useful terms for discussing language, while structural linguistics describes grammar through syntagmatic structures and notions of time, number, and gender.
3. Transformational generative grammar examines two levels of meaning - deep and surface structures - and how language can be viewed in terms of form and function.