Extending the lexicogrammar: Towards a more comprehensive account of extraclausal, partially clausal and non-clausal expressions in spoken discourse

Drawing largely on Biber et al.'s [Biber, D., Johansson, S., Leech, G., Conrad, S., Finegan, E., 1999. Longman Grammar of Spoken and Written English. Longman, London, pp. 1037ff] corpus-based description of the 'grammar of conversation', I propose a clause-based approach to (a) clause prefaces and tags, (b) independent, non-clausal expressions, and (c) formulaic speech act realisations, and discuss the implications of such an approach for a systemic functional model of language that prioritises the lexicogrammar in terms of meaning potential.