Preterite vs Imperfect Help

Hello! If I wanted to say, “This morning I was trying to open the door,” would I use intentaba or intenté? I know that it is definite and within the morning, but would that change because I am using a continuous tense? What about if I said, “This morning I was trying to open the door but I couldn’t”? Would I say, “Esta mañana intentaba/intenté abrir la puerta pero no podía/pude”? Could someone please explain this to me? By the way, this is assuming these are standalone ideas; I know some people say that the imperfect without anything else sounds incomplete. Is that true? Thank you!!

submitted by /u/jyuneu
[link] [comments]