Clause chaining and switch-reference in Aikanã and Kwaza

Abstract In Aikanã and Kwaza, neighbouring endangered isolate languages of Rondônia, Brazil, sentences can include chains of medial clauses and end with a predicate in a matrix sentence mood, such as declarative, interrogative etc. In Kwaza, traditional narratives may even consist of a single long string of medial clauses, terminated by a fixed formula in the declarative mood. In both languages, subject (dis)continuity is expressed by a switch-reference system that indicates on the predicate of the current clause whether the subject of the next clause will be different or not. In this descriptive article I present similarities and differences between the systems of switch-reference in Aikanã and Kwaza. Among the differences, I discuss cases of formally marked switch-reference that appears to express topic discontinuity rather than subject discontinuity, in Kwaza. Also, I analyse the unusual anticipatory nature of the Kwaza system. As a special feature of this article I include two versions of a traditional mythological narrative, originally told in Aikanã and later retold in Kwaza, to illustrate clause chaining and switch-reference through a coherent and culturally relevant text.