[F. Scott] Fitzgerald wrote, “As ‘cocktail,’ so I gather, has become a verb, it ought to be conjugated at least once. So here goes.
Present: I cocktail, thou cocktail, we cocktail, you cocktail, they cocktail.
Imperfect: I was cocktailing.
Perfect or past definite: I cocktailed.
Past perfect: I have cocktailed.
Conditional: I might have cocktailed.
Pluperfect: I had cocktailed.
Subjunctive: I would have cocktailed.
Voluntary subjunctive: I should have cocktailed.
Preterit: I did cocktail. *
He sure did cocktail.