The theory of grammar that is concerned with how the pragmatic, cognitive, and social functions of language relate to structure is functional grammar. It is the general theory that was developed by Simon C. Dik about the organization of natural language.

Traditional grammar focuses on the structure and rules of a language, such as parts of speech and sentence construction, while functional grammar focuses more on how language is used in communication and the meaning it conveys. Functional grammar emphasizes the purpose and function of language elements in context, rather than just their form.

Traditional grammar focuses on prescriptive rules for correct language usage, while functional grammar focuses on how language is used to communicate meaning in different contexts. Both approaches analyze syntax, semantics, and morphology, but functional grammar also takes into account the social and situational factors that influence language production. Another key difference is that traditional grammar is more concerned with form, while functional grammar emphasizes the function of language structures.

Systemic-Functional Grammar focuses on how language is used to convey meaning in different contexts, while Transformational-Generative Grammar focuses on the underlying structure of language and how sentences are generated. Systemic-Functional Grammar emphasizes the social function of language, whereas Transformational-Generative Grammar is more concerned with the universal rules that govern language.

Systemic functional grammar is grammar and use of language that is simple and to the point. It differs from transformational generative grammar by the latter being more emotive and inspirational in the words and language formats being used as opposed to being purely factual.