It is one thing to use language; it is quite another to understand how it works. (Anthony Burgess) English usage is a subject as wide as the English language itself. By far the greater part of usage, however, raises no controversies and poses no problems for native speakers of English, just because it is their natural idiom. But there are certain limited areas --particular sounds, spellings, words, and constructions--about which there arises uncertainty, difficulty, or disagreement. The proper aim of a usage guide is to resolve these problems, rather than describe the whole of current usage. The Oxford Guide to English Usage has this aim. Within the limits just indicated, it offers guidance in as clear, concise, and systematic a manner as possible.