and kutlu ?

when do we use each ?

is one formal and other between friends or something like that ?

not for now Erdinç,

tşk ederim

When we want to say Sophie's car we say it like this

Sophie'nin arabası

We use same rule which Erdinç has explained with the second noun
And the first one we add either 'nın' or 'ın' if there is a vowel at the end of the word we use 'n' as a buffer and then we add'ın'
İf there is no vowel,we add 'ın' directaly
Of course the 'I' change accourding to the vowel harmony

oppsss, sry erdinç,i didn't know you are answering this

and somebodies don't know him

Who is Ismail Yk..??

Same here,and its still not working