Errors made by Arab university students in the use of English prepositions

English prepositions are an everlasting problem for Arab learners of English. The study aims at discovering the type and cause of errors which Arab learners make in the use of English prepositions, as well as the type(s) of strategies which they use in the process of acquiring these prepositions. Seven groups of English prepositions whose members tend to be confused for each other due to interference from Arabic are presented and discussed separately from those error-types that are not caused by LI interference