Saw this and it’s 100% relatable. It’s one of the basic grammars but I still can

Saw this and it’s 100% relatable.
It’s one of the basic grammars but I still can’t differentiate once explained I can definitely understand, but as time goes by and if I’ll be the one to construct I’ll be like “whaaat should I do? ” So I just drop them when I do sentences

I think I’ll fail if a whole Korean Language exam is to construct sentences using these