In languages with aspect-based split ergativity, one portion of the grammar follows an ergative pattern, while another shows a "split." In this book, Jessica Coon argues that aspectual split ergativity does not mark a split in how case is assigned, but rather, a split in sentence structure. Specifically, the contexts in which we find the appearance of a nonergative pattern in an otherwise ergative language involve added structure - a disassociation between the syntactic predicate and the stem carrying the lexical verb stem. This proposal builds on the proposal of Basque split ergativity in Laka 2006, and extends it to other languages. The book begins with an analysis of split person marking patterns in Chol, a Mayan language of southern Mexico. Here appearance of split ergativity follows naturally from the fact that the progressive and the imperfective morphemes are verbs, while the perfective morpheme is not. The fact that the nonperfective morphemes are verbs, combined with independent properties of Chol grammar, results in the appearance of a split. In aspectual splits, ergativity is always retained in the perfective aspect. This book further surveys aspectual splits in a variety of unrelated languages and offers an explanation for this universal directionality of split ergativity. Following Laka's (2006) proposal for Basque, Coon proposes that the cross-linguistic tendency for imperfective aspects to pattern with locative constructions is responsible for the biclausality which causes the appearance of a nonergative pattern. Building on Demirdache and Uribe-Etxebarria's (2000) prepositional account of spatiotemporal relations, Coon proposes that the perfective is never periphrastic - and thus never involves a split - because there is no preposition in natural language that correctly captures the relation of the assertion time to the event time denoted by the perfective aspect.

In languages with aspect-based split ergativity, one portion of the grammar follows an ergative pattern, while another shows a "split." In this book, Jessica Coon argues that aspectual split ergativity does not mark a split in how case is assigned, but rather, a split in sentence structure. Specifically, the contexts in which we find the appearance of a nonergative pattern in an otherwise ergative language involve added structure - a disassociation between the syntactic predicate and the stem carrying the lexical verb stem. This proposal builds on the proposal of Basque split ergativity in Laka 2006, and extends it to other languages. The book begins with an analysis of split person marking patterns in Chol, a Mayan language of southern Mexico. Here appearance of split ergativity follows naturally from the fact that the progressive and the imperfective morphemes are verbs, while the perfective morpheme is not. The fact that the nonperfective morphemes are verbs, combined with independent properties of Chol grammar, results in the appearance of a split. In aspectual splits, ergativity is always retained in the perfective aspect. This book further surveys aspectual splits in a variety of unrelated languages and offers an explanation for this universal directionality of split ergativity. Following Laka's (2006) proposal for Basque, Coon proposes that the cross-linguistic tendency for imperfective aspects to pattern with locative constructions is responsible for the biclausality which causes the appearance of a nonergative pattern. Building on Demirdache and Uribe-Etxebarria's (2000) prepositional account of spatiotemporal relations, Coon proposes that the perfective is never periphrastic - and thus never involves a split - because there is no preposition in natural language that correctly captures the relation of the assertion time to the event time denoted by the perfective aspect.

This volume offers theoretical and descriptive perspectives on the issues pertaining to ergativity, a grammatical patterning whereby direct objects are in some way treated like intransitive subjects, to the exclusion of transitive subjects. This pattern differs markedly from nominative/accusative marking whereby transitive and intransitive subjects are treated as one grammatical class, to the exclusion of direct objects. While ergativity is sometimes referred to as a typological characteristic of languages, research on the phenomenon has shown that languages do not fall clearly into one category or the other and that ergative characteristics are not consistent across languages. Chapters in this volume look at approaches to ergativity within generative, typological, and functional paradigms, as well as approaches to the core morphosyntactic building blocks of an ergative construction; related constructions such as the anti-passive; related properties such as split ergativity and word order; and extensions and permutations of ergativity, including nominalizations and voice systems. The volume also includes results from experimental investigations of ergativity, a relatively new area of research. A wide variety of languages are represented, both in the theoretical chapters and in the 16 case studies that are more descriptive in nature, attesting to both the pervasiveness and diversity of ergative patterns.