Breakdown of Há muitos sapatos aqui. Quais queres comprar?
muito
much / very
aqui
here
haver
to be (there is / there are)
comprar
to buy
Questions & Answers about Há muitos sapatos aqui. Quais queres comprar?
Why is it quais here instead of qual?
Does quais translate exactly to which ones? Why isn't there a Portuguese word for ones?
In Portuguese, you do not need a separate word for ones. The word quais by itself perfectly translates to which ones because its plural form already shows you are asking about multiple items from a specific group.
I thought há meant there is. Can it also mean there are?
Why is comprar left in its dictionary form?
When you have two verbs acting together like this, only the first one is conjugated. Queres already shows who is doing the action (you want), so the second verb, comprar (to buy), stays in its original infinitive form.