
Maria G. answered 04/07/23
B.A. in Spanish with a joy for making complex things simple
In the imperfect past tense, verbs that end in -AR are conjugated with the ending -aba, and those that end in -ER or -IR are conjugated with the ending -ía.
Then, you add -s, -mos, or -n according to the subject, just like you would in present tense.
So that's why pasar becomes "pasaba", whereas comer becomes "comía" (or comíamos in #5 because the subject is "nosotros").
The verbs "ir" and "ver" are irregular in the imperfect, so you just have to memorize that they don't follow the rule and are "iba" and "veía" respectively.
Hope that helps!