Imperfect.
ok so what my question is, is that if you are trying to change a word to imperfect or preterit, can you or do you change a noun like dolar to a imperfect or do you just leave it like that?
2 Answers
"Dólar" is a noun meaning "dollar". As such it is not conjugated.
"Dolar" is also a verb, meaning "to smooth" or "to plane" (as in wood). This verb is conjugated. It is regular, stem changing verb.
Only verbs have tenses. Nouns only change by singular or plural, but then there's adjectives to further 'describe' a noun.