Why does kullanmek need the i? Can n and m not be next to each other?
can you ask again? I didn't understand your question.
The 'ı' is from the tense, Ir/Iyor, is that what you mean?
Do you mean the "ı" ?
When is 'kullanmak' used and when is 'sürmek' used?
I've heard 'O arabası sürüyor' I think.
"araba kullanmak" and "araba sürmek" mean the same thing, the former being a little more common than the latter.
I'm still a bit mistifyed by the word order. Would "Kim arrabayı kullanıyor?" be equally correct? How would the meaning change?
It is fine, but it shifts meaning slightly. It would be used when asking "Who is driving THE CAR (as opposed to who is driving the truck)" :)
to the moderators: the hints are almost never correct. are they just in a different form?