Bas Aarts is Professor of English Linguistics at University College London‎.‎ He has published many books and articles on English grammar‎,‎ most recently the Oxford Modern English Grammar‎.‎ The late Sylvia Chalker was the author of several grammar books‎,‎ including Current English Grammar and The Little Oxford Dictionary of English Grammar‎.‎ She was also a contributor to The Oxford Companion to the English Language‎.‎ Edmund Weiner is Deputy Chief Editor of the Oxford English Dictionary and co‎-author ‎(‎with Andrew Delahunty‎)‎ of the Oxford Guide to English Usage‎.‎