Keunde (근데) used after we finished a sentence. Ex: 한국어는 너무 좋아해요. 근데 한국어는 어려워요. I like Korean language. But it's difficult. Neunde (는데) used as conjunction. Ex: 한국어는 너무 좋아하는데 어려워요. I like Korean language, but it's difficult. Hope this helps :)