Bettelou Los is a Lecturer in the Department of English at the Radboud University Nijmegen. She graduated from the University of Amsterdam in 1986 and has since held teaching and research positions at the University of Amsterdam, the Vrije Universiteit, the University of Nijmegen and other colleges of high education. She participates in the research program The Diachrony of Complex Predicates in West Germanic, and has published several papers on diachronic syntax. Previous publications include The Handbook of the History of English, Blackwell, as co-editor (2006), and The Rise of the To-Infinitive, Oxford University Press (2005).