摘要：The paper studies the formation of American English under the influence of European immigration from a historical perspective. A literature review is presented first with many important early researches on American English, the history of American English, and American immigration. Then a general survey of American English is put forward, including how American English is defined, what the typical features are, how American English is formed and developed. The focus of the paper is the influences of European immigration on the formation of American English, in which the influences of Spanish, French, Dutch and German immigration are illustrated respectively.
