saber (preterite)
to find out
saber (imperfect)
to know
conocer (preterite)
to meet
conocer (imperfect)
to be familiar with; know a person or place
tener (preterite)
to get; aquire
tener (imperfect)
to have
poder (preterite)
to manage
poder (imperfect)
to be able to
no poder (preterite)
to not manage; to try and then fail
no poder (imperfect)
to be unable to
no querer (preterite)
to refuse
no querer (imperfect)
to not want