While you can transform verbs into nouns but using +기 as looked at before, you can also use -는 것.
We add it to the verb stem when using present tense. For past tense we use -(으)ㄴ 것, and for future tense use -(으)ㄹ 것.
For example, taking the base verb 공부하다:
공부한 것 = what you studied
공부하는 것 = what you study
공부할 것 = what you will study
편지를 받는 것을 좋아해요
I like receiving letters
요즘 일하는 것을 어디예요?
Where is it you are working recently?
운동하기는 건강에 좋아요
Exercising is good for your health