Have you finished doing your homework yet

Monday, September 26th Pay for a thesis to this comment. Thursday, January have you finished doing your homework yet Reply to this comment. Wednesday, February 16th Reply to this comment. Leave a Comment Yo here to cancel reply. Am I not allowed to use yet in other tenses? Which is an adverb in the following sentence? I understand it becuase this first time all correct test hahaha. Thursday, January 2nd Reply to this comment. What does adverb mean? Thanks for clarifying my doubts.