Eric Nelson has taught English as a Second Language for many years at the University of Minnesota. His primary interest has been grammar and writing for academic purposes. He lives in Minneapolis. George Yule has taught at the Universities of Edinburgh, Minnesota, Louisiana State, and Hawaii, where he now lives. He is the author of numerous books, including The Study of Language; Explaining English Grammar; Oxford Practice Grammar, Advanced; Pragmatics; and Memory Manual: Explaining, in Short and Simple Lessons.