dormíais
-you were sleeping
The word dormíais is the imperfect form of dormir in the second person plural.
See the full dormir conjugation

dormir

Creía que todos dormíais hasta la tarde.
I thought you all slept through the afternoon.
Una mujer vino a vernos mientras dormíais.
A woman visited us while you were sleeping.
Ya lo hicimos mientras dormíais.
We already did while you were sleeping.
He soñado que dormíais de pie.
I dreamt them while sleeping standing up.
Ya lo hicimos mientras dormíais.
We already did, while you were sleeping.
Ah, cierto, ese allanamiento que ocurrió mientras dormíais, en la tienda en la que vivís.
Oh right, that break-in that you mysteriously slept through, in the store you live in.
Lo siento, es que tengo la llave y no sabía si dormíais, lo siento.
I'm sorry. I'm sorry. I have a key.
Sean, sé que no eres el topo, pero ¿por qué no me contaste que Andrew y tú dormíais juntos?
Sean, I know you're not the mole, but why didn't you tell me you and Andrew were sleeping together?
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