This book presents a synchronic and diachronic study of all verbal classes and categories of the Tocharian branch of Indo-European. It lists all attested Tocharian verbal forms, together with semantic and etymological information. The material has been subject to careful philological evaluation and incorporates unedited or unpublished texts of the Berlin, London, and Paris collections. In addition, this study consistently takes into account the linguistic variation within the Tocharian B language and the relative chronology of texts. Moreover, Tocharian offers crucial evidence for the reconstruction of the PIE verbal system, and is also of interest to the general linguist for the interaction of voice and valency.