What is the verb for finish?
transitive verb. 1a : to bring to an end : terminate finished the speech and sat down. b : to use or dispose of entirely her sandwich finished the loaf. 2a : to bring to completion or issue hope to finish their new home before winter.
Did you just finished or finish?
These are all correct, of course. They are the same basic sentence in different tenses. It's very rare that a sentence is incorrect just because of the tense of the verb it contains. The question is not whether the sentences are correct, but when it is appropriate to use each one.