Questions & Answers about Koliko grama sira kupujete?
Kupujete is the 2nd person plural present form of kupovati, the imperfective verb to buy.
In this sentence, it can mean either:
- are you buying
- do you buy
The exact English translation depends on context.
It can refer to either:
- you all / you plural
- you as a polite or formal singular
So the sentence could be addressed to several people, or to one person in a formal situation.
Serbian often leaves out subject pronouns when the verb ending already shows who the subject is.
Here, -te in kupujete already tells you it is you plural/formal you, so vi is not necessary.
You could say Koliko grama sira vi kupujete?, but that would usually sound more emphatic or contrastive, not neutral.
Because koliko normally requires a quantity form, and with countable nouns that is usually the .