had remained; had arranged to meet
I had arranged to meet with a client.
Tom se había quedado mudo.
Tom had become speechless.
Vi la marca de tristeza que se había quedado grabada en su rostro.
I saw the mark of sadness that had been etched on her face.
En ese momento me di cuenta de que se me había quedado la billetera en la casa.
At that moment, I realized I had left my wallet at home.
Había quedado con los Yankees y Billy Martin.
He had made plans with the Yankees and Billy Martin.
— American Gangster (2007)
Tom descubrió que se había quedado sin dinero.
Tom discovered that he had run out of money.