E→IE Stem Changers

Three verbs we'll look at specifically are PENSAR (to think/plan), QUERER (to want), and PREFERIR (to prefer)

The "e" of the stem will change to "ie" upon conjugating them in the present tense.

Again, you will see this stem change in all forms EXCEPT NOSOTROS or VOSOTROS

Drop the endings, what do you get left?

PENS, QUER, PREFER

In the case of PREFERIR, the last "e" will have the stem change.

To close = cerrar

To understand = entender

To lie = mentir

To lose = perder

To start = empezar

To convert = convertir

To confess = confesar