¿Porqué el inglés no tiene equivalente a lo formal "Usted"?

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In English we don't have a formal version of YOU but we do have other ways to make the sentence formal in the language. Just by adding PLEASE in a request makes it more formal... Instead of using "Can you do me a favor? " "Could you do me a favor?" also makes it more formal, and a lot of other ways that we can study more about in a lesson or other videos :)