3-2 Verbs with different meanings in the Preterite and Imperfect Tenses

Auténtico 3 Capítulo 2 grammar

conocer (imperf)

I knew, was acquainted with

conocer (preterit)

I met, made the acquaintance of

costar (imperfect)

it cost (before purchasing)

costar (preterit)

it cost (after purchasing, you actually bought it)

poder (imperfect)

could, was able to (was in the position to)

poder (preterit, pud-)

tried it, was able to, and did it

no poder (imperfect)

was not able to, could not

no poder (preterit)

tried, but couldnt

querer (imperfect)

wanted to, desired to

querer (preterit)

tried to

no querer (imperfect)

didn't want to

no querer (quis-)

refused, would not

saber (imperfect)

knew, knew how to, had the knowledge that

saber (preterit)

Learned, found out

tener (imperfect)

I had (in my possesion)

tener (preterit)

I had, received

tener que (imperfect)

had to (but didn't necessarily do it)

tener que (preterit)

had to (and did do it)