Do you know any guide that will explain the Grammar a bit more in details? The prefix are very difficult for me and I need further explanations.
Yes, that's what I meant, It is very difficult for me so to have more specific information is great!
Suffixes are the most difficult thing for me too. It would be good if there could be more testing of alternative suffixes on Duolingo like on the TELC exams. Unfortunately there is no center doing TELC Turkish in the city where I live. I mailed a few TELC centers in Istanbul but they have not replied so before my next stay in Istanbul I will call them to check if they do any TELC Turkish exams. Unless anyone else has info already?