The English language has historical, social, and regional variations (dialects). Standard English can be formal, such as the English used in published works, business meetings, classrooms, school reports, and formal speeches. Standard English can also be informal, such as the English used in our conversations with friends and in casual letters. Another form of English is classified as nonstandard English; it is characterized by faulty word usage, slang, and incorrect grammar. Using nonstandard English can make your writing seem as though it was written by an uneducated person. It is a good idea to find an English grammar training websites to have a general knowledge about English grammar.

English grammar training courses also address the three issues underlying all errors of grammatical usage: the idea of Standard English, the effects of language change on English grammar, and the effects of language attitudes on our perception of "correct" English. It will be of interest to anyone who wishes to increase his or her confidence in presenting English clearly, and improve his or her editing and proofreading abilities.