Imperfecto para el sujetoellos/ellas/ustedesdel verboestornudar.

estornudar

No lo sé, todos estornudaban.
I don't know, everybody was sneezing.
Los únicos seres que en aquella cocina no estornudaban eran la cocinera y un rollizo gatazo que yacía cerca del fuego, con una sonrisa de oreja a oreja.
The only things in the kitchen that did not sneeze, were the cook, and a large cat which was sitting on the hearth and grinning from ear to ear.
Palabra del día
el hada madrina