was preparing
Dijo que estaba preparando una sorpresa para su esposa.
He said he was preparing a surprise for his wife.
Mi madre se estaba preparando para cenar.
My mother was getting ready for dinner.
En ese momento estaba preparando la cena.
At that moment I was preparing dinner.
Estaba preparando una documentación minuciosa.
I was preparing meticulous documentation.
— Divorzio all'italiana (1961)