"You are ugly!"
Translation:Du är ful!
full has a short vowel and long consonant, ful has a long vowel and short consonant. There are lots of pairs like this in Swedish, so this is pretty important.
Does "ugly" here have the same meaning as having bad manners, or is it strictly referring to appearance?
In this sentence, I don't know why it is fula and not ful and what purpose does the Ni have.