To conjugate regular -ar verbs in the imperfect, simply drop the ending (-ar) and add one of the following:
-aba -abas -aba -ábamos -abais -aban |
To conjugate regular -er and -ir verbs in the imperfect, simply drop the ending (-er or -ir) and add one of the following:
-ía -ías -ía -íamos -íais -ían |