Questions & Answers about Eu fico sentado no sofá.
Both ficar and estar can be used with adjectives or past participles, but they don’t mean exactly the same thing.
Eu estou sentado no sofá.
= I am (right now) sitting / seated on the couch.
Focus: current state.Eu fico sentado no sofá.
Literally: I stay seated on the couch or I end up sitting / I keep sitting on the couch.
Focus: remaining in that state or a repeated/habitual situation.
So ficar here suggests:
- staying in that position for some time, or
- a typical behavior, especially if you add something like o dia todo (all day):
Eu fico sentado no sofá o dia todo. = I stay (keep) sitting on the couch all day.