No prior knowledge of formal linguistics is required as the book provides:
The third edition is updated throughout, and is based closely on the fourth edition of Halliday and Matthiessen's Introduction to Functional Grammar. A glossary of terms, more exercises and an additional chapter are available on the product page at: https://www.routledge.com/9781444152678.
Introducing Functional Grammar remains the essential entry guide to Hallidayan functional grammar, for undergraduate and postgraduate students of language and linguistics.