The information that nonnative speakers of English must master regarding the lexicon is extensive. It is not sufficient simply to know many lexical items and their general meanings. For each item, nonnative speakers must master a network of related information about its form, meaning, and use if they wish to use the item accurately, meaningfully, and appropriately. Also, clearly, we can no longer think of the lexicon as a list of words having specified properties subject to combinatory rules. We must think of the lexicon as being composed of multiword units as well.