The developments in linguistic theory over the last three decades have given us a better understanding of the formal properties of language. However, as the truism goes, language does not exist in a vacuum. It in teracts with a cognitive system that involves much more than language and functions as the primary instrument of human communication. A theory of language must, therefore, be based on an integration of its for mal properties with its cognitive and communicative dimensions. The present work is offered as the modest contribution to this research paradigm. This book is a revised and...