This chapter examines complex sentences, i.e., sentences with two or more lexical verbs, and therefore two or more clauses. It discusses coordination, including juxtaposition, and subordination in nominal, adjectival and adverbial clauses. This chapter also provides conlanging practice, includes a guided set of questions to facilitate building complex sentences in a conlang, and exemplifies complex sentences in the Salt language

Complex sentences stand at the edge of discourse: they represent conventionalized forms of discourse cohesion. Coordination and adverbial subordination express the same types of semantic relations between events. Coordination packages the related events in a symmetrical, complex figure construal; adverbial subordination packages them in an asymmetrical, figure--ground construal between a matrix clause and a dependent clause. Referents and other concepts may be coordinated as well. Both coordination and adverbial subordination share the same strategies. Both may use conjunctions to express the relation between events, although the semantic categories expressed by coordinating conjunctions differ from those expressed by adverbializers. Both may use either a balanced or deranked strategy for the form of the predicates expressing the events. Crosslinguistically, one can distinguish two types of deranked predicate forms: converbs (for adverbial subordination) and action nominals. Conjunctions typically originate from discourse markers. Deranked coordination appears to originate in deranked subordination; in some languages, both are expressed identically.