"I see a bird on the roof."

[petermuster550]

Why is it only "çatıda" to say "on the roof" but "masanın üsterinde" to say "on the table", for example?

[JeremyWyat1]

Why is it kus and not kusu (only English characters available here)

[bknckn]

If we were to say "kuşu" it would mean "the bird" instead of "a bird." There is no need to use both "bir" and the -I suffix

[Reinhard724792]

Why is: "bir kuş çatıda görüyorum" not accepted?