Book excerpt: This book explores the origin and evolution of important grammatical categories of the Indo-European verb, including the markers of person, tense, number, aspect, and mood. Its central thesis is that many of these markers can be traced to original deictic particles which were incorporated into verbal structures in order to indicate the 'hic and nunc' and various degrees of remoteness from the 'hic and nunc'. The alterations to which these deictic elements were subject are viewed here in the context of an Indo-European language very different from Brugmannian Indo-European, many features of which, it is argued, appeared only in the period of dialectal development. This book challenges numerous traditional proposals about the Indo-European verb; all reconstructions contained in it are firmly based on extant data and are consonant with established principles of linguistic change.