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.

Grammaticalization has often been described as a gradual phenomenon. While many studies have discussed the quantitative aspects of grammaticalization, there has been little to no work that has tried to propose a way of measuring degrees of grammaticalization. This book addresses this gap by proposing a corpus-based approach to the measurement of grammaticalization, using binary logistic regression modelling. Such an approach has theoretical benefits as it can provide empirical evidence for the gradience and gradualness of grammaticalization. It can help substantiate observations that have been done on the basis of case studies so far, such as the hypothesized unidirectionality of grammaticalization. In addition, as the methods proposed in this book rely on corpus-based data only, it offers a way of comparing grammaticalization across multiple languages, which is currently a challenging endeavour. What this book hopes to achieve is to start a discussion on the measurement of grammaticalization. To draw a parallel, the field of morphological productivity has greatly benefited from the discussions (and disputes) regarding how its object of study should be measured, and I believe that so will the field of grammaticalization.

This volume advances our understanding of two highly debated aspects of grammaticalization: its relation to (inter)subjectification and its directionality. These aspects are studied with respect to such phenomena as auxiliaries, discourse markers, conjunctions, prepositions and pronouns. Bringing together a wide range of languages, the collection provides insight into the crucial dimensions of grammaticalization research.

The status of grammaticalization has been the subject of many controversial discussions. The contributions to What makes Grammaticalization? approach the prevalent phenomenon from the angle of language structure and focus on the interrelation between the levels of phonology, pragmatics (inference), discourse and the lexicon and some of them try to integrate the areal perspective. A wealth of data from Slavonic languages as well as from languages of other genetic and areal affiliation is discussed. The book is of interest to linguists specializing in grammaticalization, lexicalization and morphological typology, to language typologists as well as to functional, historical and cognitive linguists.

The volume contains a selection of papers originally presented at the symposium on “Areal patterns of grammaticalization and cross-linguistic variation in grammaticalization scenarios” held on 12-14 March 2015 at Johannes Gutenberg University of Mainz. The papers, written by leading scholars combining expertise in historical linguistics and grammaticalization research, study variation in grammaticalization scenarios in a variety of language families (Slavic, Indo-Aryan, Tibeto-Burman, Bantu, Mande, "Khoisan", Siouan, and Mayan). The volume stands out in the vast literature on grammaticalization by focusing on variation in grammaticalization scenarios and areal patterns in grammaticalization. Apart from documenting new grammaticalization paths, the volume makes a methodological contribution as it addresses an important question of how to reconcile universal outcomes of grammaticalization processes with the fact that the input to these processes is language-specific and construction-specific.

This book presents a critical assessment of research on grammaticalization, a central element in the process by which grammars are created. Leading scholars discuss its core theoretical and methodological bases, report on work in the field, and point to directions for new research. They represent every relevant theoretical perspective and approach.

The study of grammaticalization raises a number of fundamental theoretical issues pertaining to the relation of langue and parole, creativity and automatic coding, synchrony and diachrony, categoriality and continua, typological characteristics and language-specific forms, etc., and therefore challenges some of the basic tenets of twentieth century linguistics.This two-volume work presents a number of diverse theoretical viewpoints on grammaticalization and gives insights into the genesis, development, and organization of grammatical categories in a number of language world-wide, with particular attention to morphosyntactic and semantic-pragmatic issues. The papers in Volume I are divided into two sections, the first concerned with general method, and the second with issues of directionality. Those in Volume II are divided into five sections: verbal structure, argument structure, subordination, modality, and multiple paths of grammaticalization.