What is the basic form of 느립니다? Is it 느리다?
개가 느려요 and 개가 느립니다 is the same thing, so why did it say I was wrong?
I think 개가 느립니다 is more formal than 개가 느려요
I think one is formal and the other is casual
your answer is correct and most of the time duolingo will count that form as correct. it used to only accept the high formal way though and i guess they haven't fixed this one yet, as i had the same issue :/
It's still considered a beta