Verbs of Mental Processes Since verbs indicating a mental process usually take place over a period of time, they usually are expressed in the Imperfect tense when talking about the past. The most common verbs of this type are: creer to believe querer to want/wish preferir to prefer saber to know desear to want pensar to think poder to be able tener ganas de … to feel like . . . Yo creía que Elena me dijo la verdad. I believed that Elena told me the truth. Luisa tenía ganas de ir al cine. Luisa felt like going to the movies. Nuestros padres sabían lo que hicimos. Our parents knew what we did. **Remember that saber has a different meaning in the Preterite tense! Nuestros padres supieron lo que hicimos. Our parents found out what we did.