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When do you use Preterite
One time, specific period of time like last month, last year, last day
When do use Imperfect
Habitual, continous actions in past ( Occasinally)
Preterite (yo form) ar verb
é
Preterite (tú form) ar verb
aste
Preterite (el/ella form) ar verb
ó
Preterite (nosotros form) ar verb
amos
Preterite (vosotros form) ar verb
asteis
Preterite (Ellos/Ellas form) ar verb
aron
Preterite (yo form) er/ir verb
Í
Preterite (tú form) er/ir verb
iste
Preterite (el/ella form) er/ir verb
ió
Preterite (nosotros form) er/ir verb
imos
Preterite (vosotros form) er/ir verb
isteis
Preterite (ellos/ellas form) er/ir verb
ieron
Imperfect (yo form) ar verb
aba
Imperfect (tu form) ar verb
abas
Imperfect (el/ella form) ar verb
aba
Imperfect (nosotros form) ar verb
ábamos
Imperfect (vosotros form) ar verb
abáis
Imperfect (ellos/ellas form) ar verb
aban
Imperfect (yo form) er/ir verb
ia
Imperfect (tu form) er/ir verb
ias
Imperfect (el/ella form) er/ir verb
ia
Imperfect (nosotros form) er/ir verb
iamos
Imperfect (vosotros form) er/ir verb
iais
Imperfect (ellos/ellas form) er/ir verb
ian