Similarly, how do I know if "van" comes before or after the object?
From my understanding, it can be before or after. After would put focus on what is owned rather than who is owning it.
when is it necessary to include "egy"?
I wrote "a munkásnak van régi rossz rádiója", without "egy"
It's generally optional but does emphasise the singleness of the object. If you were to ask someone whether they had a pen, you would probably not use "egy", since you wouldn't expect them to reply in the negative, if they had two.
i think 'a munkásnak egy régi rossz rádiója van' should also be accepted
why is "A munkásnak egy régi rossz rádiója van." not accepted, when in another exercise "Jánosnak öt gyűrűje van." with the "van" at the end is?
Are you sure? As I see, "A munkásnak egy régi rossz rádiója van" is accepted here.
Thank you, maybe I had another spelling mistake. Though I thought, I had a thorough look before posting my question.