Tener, Saber, Conocer in the Imperfect

There are words that change their meaning when put into the preterite tense from the present. These words change BACK to their original meaning when put in the imperfect.

Let’s review.

VerbPresent TensePreteriteImperfect
conocerconozco (I know)conocí (I met)conocía (I knew)
sabersé (I know)supe (I found out)sabía (I knew)
tenertengo sed (I’m thirsty)tuve sed (I got thirsty)tenía sed (I was thirsty)

Por ejemplo: