In Level 6 Lesson 15, we looked at the structure -(이)라는 것, which can be used to express what you think is the definition or the nature of something. You can do the same with verbs, except with a slightly different structure. Be sure to check out all the sample sentences and practice by making your own sentences in the comment!
You can view a free PDF for this lesson here, or if you want to study with our TalkToMeInKorean textbooks, you can get them here. And after you learn the basics, try writing your own Korean sentences and get corrections from native speakers through HaruKorean, our 1:1 correction service.