Michael Halliday: Functions of Language.

Function	Example
Instrumental	Language to express needs etc… “I want…”
Personal	Language which expresses individual identity.
Interactional	Language used to develop social relationships.
Regulatory	Language to influencing the behaviour of others. Indicating “Do as I say.”
Representational	Language used for exchanging information.
Heuristic	Language aimed at learning and exploring the world around them. A “tell me why” feel.
Imaginative	Language to tell stories, jokes, to create imaginary worlds/story telling.