This document provides an introduction to Systemic Functional Grammar (SFG). It discusses the following key points:
1) SFG views language as a system of choices and was developed based on the work of Malinowski, Firth, and Halliday. It examines language from a functional perspective rather than just a structural perspective.
2) SFG represents grammar as system networks that show the paradigmatic choices available and realization rules that map choices to syntactic structures. This models the relationship between semantic choices and surface structures.
3) In SFG, language is analyzed in terms of three metafunctions - the ideational to represent experience, the interpersonal to enact social relationships, and the textual to organize messages