Deriving VOS from VSO in Tongan
Research on word order has established several possible ways in which VOS order can be derived from VSO order. This chapter considers the derivational relationship between VSO and VOS in the Polynesian language Tongan. VSO order is basic in Tongan, and we address the derivation of VOS from this basic order in the context of multiple possibilities. We argue that Tongan VOS is better analyzed as rightward displacement of the subject as opposed to leftward displacement of the object proposed by Otsuka (2005a,c). The clause-final subject shows many of the hallmarks of rightward movement, including information-structural restrictions, locality with respect to the matrix clause, lack of clitic doubling, and connectivity with respect to case and binding. Given that rightward movement has an uneasy place in syntactic theory, we take pains to establish that the analysis is successful and worth further scrutiny.