精选优质文档-倾情为你奉上English is known as a world language, regularly used by many nations whose English is not their first language. Like other languages, English has changed greatly. The history of the English language can be divided into three main periods : Old English, Middle English and Modern English. The English language started with the invasion of Britain by three Germanic tribes during the 5th century AD, and they contributed greatly to the formation of the English language. During the m
