I'm sorry, I'm way too confused right now. I'm not understanding that if く replaces the last い in the stem of a verb you can conjugate かわいくない for present negative... Why is the い there? God, this should be so basic to me by now but it's wracking my mind. As for my asking about how to find a stem, I asked because I am uncertain on if removing the い creates the stem or not. I assume it is as the stem of かわいい is かわい.