has been trusting
Presente perfecto progresivo para el sujeto he/she del verbo trust.

trust

Popularity
500+ learners.
It seems more likely that Isaac, who has been trusting and compliant throughout this story, permits Abraham to bind him.
Es más probable que Isaac, quien ha mostrado confianza y obediencia a lo largo de esta historia, permite que Abraham le ate.
Palabra del día
la pista de patinaje