hilfy - Your statement is correct in several respects in that the Norman conquests are considered as one of the most important, if not the most important, event in the development of the English Langauge. The Norman conquests are behind the development of "Middle English". But "Old English" does predate the Normans by roughly 500 years, and is heavily Germanic, with the Angles and the Saxons being the predominate peoples settling Britain in the 5th and 6th centuries. Although, much of Old English has been discarded, hence the importance of the Norman invasions, there are still many words that trace back to Old English, not the least of which is the verb 'to be'.
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