Areas of contradiction and controversy over error analysis are discussed, and an interference error analysis project is described, giving a detailed definition of interference error. Several practical approaches to teaching out interference errors are outlined. (MSE)

English prepositions are generally considered difficult to teach to nonnative speakers, for a variety of reasons: the large number of possible meanings for many prepositions, which change according to the context in which they are used; the lack of a written guide to usage; and, for native Arabic speakers, the commonly-used grammar-translation…