Ayer Pilar llegó a su casa, estuvo leyendo la carta, estuvo preparando su ponencia, estuvo comiendo y se fue a la cama.
yesterday P.arrived to her home, was-PRET reading the letter was-PRET preparing her paper was-PRET eating and her-REFL.went to the bed
Yesterday, P. came home, spent some time reading the letter, preparing her paper and eating, and finally went to bed.