there are 2 separate lesson on this verb poder with the meaning of could, able to do something or not.
May I check if my understanding is correct?
Perfect tense and indefinido both means not being able to something, did not manage to do it, and we saw the result which is able or not able to. They have the same meaning but just that different time period will trigger each of them separately.
Whereas, imperfect tense is about the action not able or being able to do at a specific time but we did not know the ending.
Hope someone could help clarify.
Thanks