This book reconciles what is known of the Proto-Indo-European verbal system with the evidence of Hittite and the other early Anatolian languages. The decipherment of Hittite in 1917 and the recognition that it was an Indo-European language had dramatic consequences for conceptions of the Indo-European parent language. For most of the twentieth century, attention focused on the peculiarities of Hittite phonology, especially the consonant h and its implications for the evolving laryngeal theory. Yet the morphological "disconnects" between Hittite and the other early languages are more profound than the phonological differences. The Hittite verbal system lacks most of the familiar tense-aspect categories of Sanskrit, Greek, and Latin. It also presents the novelty of the hi-conjugation, a purely formal conjugation class to which nearly half of all Hittite verbs belong. Repeated attempts to explain the hi-conjugation on the basis of the classical model of the Proto-Indo-European verbal system have failed. The question is not whether the conventional picture of the parent language must be modified to account for the facts of Hittite, but how. In this outstanding book, now in paperback, Professor Jasanoff puts forward a new and revolutionary model of the Proto-Indo-European verbal system that promises to have a major impact on Indo-European studies. His strikingly original synthesis, reflecting a quarter-century-long study of the problem, is the most thorough and systematic attempt thus far to bridge the gap between Hittite and the other Indo-European languages.