1. The document discusses Transformational Generative Grammar, which is a theory of grammar developed by Noam Chomsky that uses transformations to relate deep and surface structures of sentences.
2. It defines key concepts of transformational grammar like deep structure, surface structure, and transformations. Deep structure is the underlying form of a sentence before rules are applied, and surface structure is the final spoken/heard form.
3. Examples of transformations provided include passive, extraposition, and various focusing transformations like end-focus that place important information at the end of sentences.