yo aguantaba
I used to endure / I was enduring
tú aguantabas
you used to endure / you were enduring
él aguantaba
he used to endure / he was enduring
nosotros aguantábamos
we used to endure / we were enduring
vosotros aguantabais
you used to endure / you were enduring
ellos aguantaban
they used to endure / they were enduring