Can we use couldn't to talk about present and past ? Does the meaning change?
(A) I'm locked here and I couldn't open the door can you help me? (Present)
(B) yesterday I couldn't open the door so I broke it. (Past)
Are these sentences correct??
If yes , you mean we can use couldn't to talk about both past and present disability or impossibility??
How can we understand that it is about past or present if there was no time expression??