This book brings together a series of contributions to the study of grammaticalization of tense, aspect, and modality from a functional perspective. All contributions share the aim to uncover the functional motivations behind the processes of grammaticalization under discussion, but they do so from different points of view. "[...] this volume contains careful, high quality research by both leading and emerging scholars in the field and provides an important contribution to the study of the grammaticalization of TAME." Brendon Yoder in: LINGUIST List 29.3638 (21.09.2018), https: //linguistlist.org/issues/29/29-3638.html "[...] this volume contains careful, high quality research by both leading and emerging scholars in the field and provides an important contribution to the study of the grammaticalization of TAME." Brendon Yoder in: LINGUIST List 29.3638 (21.09.2018), https://linguistlist.org/issues/29/29-3638.html K. Hengeveld , University of Amsterdam; H. Narrog , Tohoku University, Japan; H. Olbertz , University of Amsterdam.