-ㄴ다 : present tense. ex) 먹다. eat - 먹는다. (be) eating, having. or just no tense describing attributes. -게 :make adverbs. ex) 쉽다. easy - 쉽게. easily. -(으)ㄴ: changed form of adjectives to modify nouns. ex) 그 인형 예쁘다.(The doll is pretty.) - 예쁜 인형. (pretty doll) -(으)ㄹ: changed form of verbs to modify nouns or to mean future tense. ex) 하다. do - 오늘 할 일. Today's to-do list. There could be more usages of the ending. I just wrote down what poped up in my head.