Imperfect Subjunctive - I was speaking, I used to speak, I would (used to) speak, I spoke

-ar verbs -er verbs -ir verbs
Yo -ara -iera -iera
Tú -aras -ieras -ieras
El, Ella, Usted -ara -iera -iera
Nosotros -áramos -iéramos -iéramos
Vosotros -arais -ierais -ierais
Ellos, Ellas, Ustedes -aran -ieran -ieran