as in the conjugation for the present tense the conjugation
of the pretérito
imperfecto is different depending on the ending
of the infinitive verb (-ar,
-er, -ir). First we need to find the stem of
the verb, which is for regulars easy: take the infinitive
ending of the verb away. Then the new endings are put
The good news about the pretérito
imperfecto is that it is in most cases regular.
There are only a few irregular verbs that change the
stem in the imperfect tense.