Question

Different with by and bye
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Answer 1

By is used to denote a person or object.
Bye is used while departure.

Answer 2

Answer:

Different between by and bye is that "by" is used as a preposition to show who performed the action and as an adverb to indicate a past action.while "bye" is a shortened from of "goodbye" and it used to indicate farewell or leaving someone's presence.