"Did you go there on the ninth?"
Translation:Jeli jste tam devátého?
I've read that in the case of polite plurals (using "vy" when addressing one person), one should use "jste" in plural, but the past verb should be in singular. However, when I wrote, "Jel jste tam devátého?" I was told that the correct answer is "jeli jste." Is that really the right answer for both regular plural and the polite plural?