What is a verb? How do you define a sentence? As with many simple questions, the answers can be complex. This concise introduction to the structure of English has been written to help advanced students and teachers who want to know more about English grammar. These are not prescriptive rules, but rather an explanation of the linguistic patterns that govern daily English use. The book's first part discusses language varieties and standard English, while the second part examines English structure from its smallest part to its largest. A final section provides an extensive glossary of linguistic terms.