Irregular Verb Rules
This causes verbs to be considered irregular.
What is ... a change in the stem when they are conjugated.
Entender (to understand)
Yo ...
entiendo
Yo no quiero cantar.
I don't want to sing.
They want to read a book.
Ellos quieren leer un libro.
These forms are unaffected by the stem change in the presnet tense.
What are nosotros and vosotros?
Devolver (to return something)
Yo ...
Tú ...
ella ...
devuelvo
deveulves
devuelve
Podemos bailar bien.
We are able to dance well.
He wants to be able to run.
Él quiere poder correr.
Oyes, oye, oyen reflect this.
What is ... a spelling change rather than a stem change.
Venir (to come)
Yo ... Nosotros ....
Tú ..... Vosotros ...
Ud. .... Uds. ....
Yo vengo Nosotros venimos
Tú vienes Vosotros venís
Ud. viene Uds. vienen
Susan quiere poder hablar español.
Susan wants to be able to speak spanish.
She has a cat. Does she have a dog?
Ella tiene un gato. ?Tiene ella un perro?