Martin Hilpert combines construction grammar and advanced corpus-based methodology into a new way of studying language change. Constructions are generalizations over remembered exemplars of language use. These exemplars are stored with all their formal and functional properties, yielding constructional generalizations that contain many parameters of variation. Over time, as patterns of language use are changing, the generalizations are changing with them. This book illustrates the workings of constructional change with three corpus-based studies that reveal patterns of change at several levels of linguistic structure, ranging from allomorphy to word formation and to syntax. Taken together, the results strongly motivate the use of construction grammar in research on diachronic language change.