yo sospechaba
I used to suspect / I was suspecting
tú sospechabas
you used to suspect / you were suspecting
él sospechaba
he used to suspect / he was suspecting
nosotros sospechábamos
we used to suspect / we were suspecting
vosotros sospechabais
you used to suspect / you were suspecting
ellos sospechaban
they used to suspect / they were suspecting