Halliday & Matthiessen (2014: 454):
Conjunctions may be used to mark the secondary clause in both parataxis and hypotaxis; but different classes of conjunction are used. With parataxis, linkers are used, but only when the logico-semantic relation is one of expansion (e.g. and, or, but). Linkers may also serve a cohesive function. With hypotaxis, binders are used, in the environment of both projection (that; whether, if) and expansion (e.g. when, while; because, since, if, although) and also, in the case of certain non-finite clauses, conjunctive prepositions (e.g. after, before; because of, despite). Both parataxis and hypotaxis may involve correlative conjunctions, where a second conjunction marks the primary clause.