Respuesta :

pensar change to ie 
yo pienso 
tu piensas
el/ella piensa 
vosotros pensais
ellos/ustedes piensan.

Answer:

The e in the verb pensar changes to "ie" in four of the six present tense conjugations.

Explanation:

The conjugation of the verb "Pensar" in present tense in Spanish changes in the first person "Yo Pienso", the second person singular and plural "Tu piensas / Ustedes Piensan" third person masculine and feminine, singular and plural "El / Ella/ Piensan / Ellos piensan" The only person that doesn't change is "Nosotros pensamos"