This series does not specialise in any one area of language study, nor does it limit itself to any one theoretical approach. Synchronic and diachronic descriptive studies, either syntactic, semantic, phonological or morphological, are welcomed, as are more theoretical 'model-building' studies, and studies in sociolinguistics or psycholinguistics. The criterion for a work's acceptance is the quality of its contribution to the relevant field. All texts published advance our understanding of the nature of language in areas of substantial interest to major sectors of the linguistic research community. Traditional scholarly standards, such as clarity of presentation, factual and logical soundness of argumentation First published 1991 by Routledge 11 New Fetter Lane, London EC4P 4EE This edition published in the Taylor & Francis e-Library, 2005. "To purchase your own copy of this or any of Taylor & Francis or Routledge's collection of thousands of eBooks please go to www.eBookstore.tandf.co.uk." Simultaneously published in the USA and Canada by Routledge a division of Routledge, Chapman and Hall, Inc.