This major new edition, based on extensive corpus and academic research, provides students and teachers with an authoritative and up-to-date grammar of English. Fully updated based on extensive corpus research into areas of grammar that have changed in recent years; Clear explanations of common grammatical patterns using simple language; Highlights British and American English differences; Two brand-new supplements on grammar for business and in an academic environment; Unique notes on how the language works help you express yourself more confidently and freely; Thousands of examples from the Collins corpus illustrate how grammar points are used in everyday English.