Lesson 1
Verbs with a change of the root, E becomes IE
Verbs that change E for IE in the root, do that for each person, except nosotros:
Verbs ending with –AR Verbs ending with –ER Verbs ending with –IR
Pensar (to think) Entender (to understand) Preferir (to prefer)
Yo pienso Yo entiendo Yo prefiero
Tú piensas Tú entiendes Tú prefieres
El piensa El entiende El prefiere
Ella piensa Ella entiende Ella prefiere
Usted piensa Usted entiende Usted prefiere
Nosotros pensamos Nosotros entendemos Nosotros preferimos
Ellos piensan Ellos entienden Ellos prefieren
Ellas piensan Ellas entienden Ellas prefieren
Ustedes piensan Ustedes entienden Ustedes prefieren
Below are some more verbs that are conjugated with this root change.
Verbs ending with –AR Verbs ending with –ER Verbs ending with –IR
Recomendar (to reccommend) Entender (to understand) Sentir(se) (to feel)
Pensar (to think) Perder (to lose) Sugerir (to suggest)
Gobernar (to govern) Querer (to want) Divertir (to amuse)
Comenzar (to start) Defender (to defend) Consentir (to consent)
Empezar (to begin) Encender (to turn on) Preferir (to prefer)
Nevar (to snow, only used Etc. Etc.
In the third person singular)