Does "вы" always take the "слышали" past tense?
Is there an acceptable distinction between "вы слышал" (you, formal singular) versus "вы слышали" (you, formal plural)?
No. Вы always takes plural endings, even if you are referencing a single person.
Is there something wrong with "What were you hearing" ?
I don't think so. Russian has only one past tense so far that I'm aware of.
Why is it "слышали" and not "слУшали"?
Those are different verbs. слушали - pl. listened, слышали - pl. heard.
спасибо, makes sense!
It counted “What were you listening to?” as incorrect. Why is it incorrect?
The verb cлышать means "hear". I believe "listen" would be the verb слушать.
What would be "What are you listening to?" ?
What is wrong with "Did you hear that?" Is it sentence arrangement? Because I thought "что" could mean both "what" and "that".
What did you hear? - Что вы слышали?
Did you hear that? - Вы слышали это(то)?
"That" = "Что" - как соединительный союз. I thought, that he worked hard.
It sounded more like слушалЕ rather than слушалИ
Why is is wrong ...What are you listening to?
And how would you say it?
hmm... this was marked wrong: what were you hearing
Just in case, this was marked as wrong: what were you listening
Can it be also: What have you heard? Does the past in Russian represents also the present perfect in English?