Hewson J., Bubenik V. Tense and Aspect in Indo-European Languages. Theory, Typology, Diachrony

Amsterdam/Philadelphia: John Benjamins Publishing Company, 1997 - 417 pp. — (Current Issues in Linguistic Theory 145). — ISBN: 90 272 3649 6In this work we have attempted to analyse the historical and prehistorical evolution of the verbal systems of all the major branches of the Indo-European phylum of languages, concentrating particularly on the sub-systems of tense and aspect.
What is new in these chapters, therefore, is first of all an attempt to gain a general picture of the systemic evolution of the verbal systems of IE languages. We have also, as far as possible, sought for a rationale for the systemic changes, rather than treat them as "blind and fortuitous" changes.