to meet
conocer-preterito
it occurred to me
pensar-preterito
to manage to do something
poder-preterito
implies you did not; you refuse to do something
no querer-preterito
tried to, but did not succeed
querer-preterito
to find out
saber-preterito
received
tener-preterito
had to do something and did it
tener que-preterito
supposed to do something, but did not
tener que-imperfecto
to have
tener-imperfecto
to know, to be aware of a fact
saber-imperfecto
wanted to
querer-imperfecto
does not imply you refused to do something
no querer-imperfecto
to have the ability to do something
poder-imperfecto
to think
pensar-imperfecto
to know
conocer-imperfecto
what are the ambiguous the preterito and imperfecto verbs
conocer, pensar, poder, no querer, querer, saber, tener, tener que