"남자가 공원에서 운동합니다."
Translation:The man exercises at the park.
One-Stop Guide to Korean Particles - 은/는/이/가 (Subject & Topic Markers) https://www.youtube.com/watch?v=fCxLNRLntc0&t=48s&index=16&list=PLur6Oh2P2xHmzrUXUQycI5HF79OVAWu9w
In “does exercise”, “exercise” is the main verb and “does” is the helping verb and it is most certainly correct, though I don’t know if Duolingo accepts it or whether there is another way to show the emphatic form in Chinese. I suppose you could say “does exercises” just as you would say “does sports.”, but is it a good translation of the Chinese?