Professor of Linguistics, University of New Mexico

Professor Emeritus of Linguistics, Brigham Young University

Columbia University

Uppsala University

Radboud University Nijmegen, CLS

Visiting Scholar, Dept. of French & Italian, Indiana University

Professor of Linguistics and Pragmatics, MAE, The University of Manchester

Professor of Linguistics, University of California, Berkeley

Assocate Professor in Applied Linguistics, University of Leicester

Professor of English Language and Linguistics, Osnabrück University