What is vowel harmony?
How to know, whether to put "i" or "ı"?
They are different letters, that is different sounds like u and ü or a and e.
Of course. The queation is how to choose one in the suffix.
vowel harmony is the most important rule in Turkish, https://www.duolingo.com/comment/9041808
thanks a lot!
It depends on the preceding vowel. Now its ı. So to avoid to consonants together we add vowel depending on the latest vowel. i,ö and ü use iyorum and I, O and U use ıyorum