Do existed in Old English more than a thousand years ago as a regular verb and meant to cause . It is impossible to say who introduced it to English. It's use as an auxiliary in questions and negations was established in Shakespeare's day when it was correct to say both I know not him...
ESL Linguistics Discussion Forum
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Cool Breeze
295 days ago
Nouns, Verbs, Auxiliaries, Tenses, Grammar, Whom, Clauses, Pronouns, English Grammar, Negations, Relative Pronouns