Grammar Beyond The Clause Complex: Cohesion

Halliday & Matthiessen (2014: 44):

Thus the grammar makes the local structure of the text ‘tighter’, more highly integrated, by constructing it not only as meaning but also as wording. However, the grammar also provides some important guidance beyond the domain of the clause complex, i.e. beyond the most extensive domain of grammatical structure. It does this by means of the resources of cohesion, e.g. by means of cohesive conjunctions such as for example, in addition, in contrast, therefore, meanwhile, which can mark relations between sequences realised by clause complexes and also between (groups of) rhetorical paragraphs.