Stem-Changing Verbs
Irregular Yo Forms
Ser/Estar
Saber/Conocer
Present Progressive
100
We are the three main types of stem changes.
What is E --> IE, E --> I, O --> UE
100
This is the yo form of 'tener'
What is 'tengo'
100
This verb is used to express more temporary things such as emotions, states, and location.
What is estar.
100
This verb is used to say that one knows a fact, a piece of knowledge, or how to do something.
What is saber
100
The 1st part of the present progressive construction is the conjugated form of this verb.
What is estar.
200
Yo ___________ (poder) leer el libro.
What is puedo
200
This is the yo form of 'decir'
What is 'digo'
200
This verb is used to express more lasting things such as descriptions and characteristics. It is also used to express time, professions, nationality, and location of events.
What is ser.
200
This verb means that one is familiar with a person, place, or thing.
What is conocer
200
The 2nd part of the present progressive is the gerund, which can have either of these two endings.
What is -ando and -iendo
300

Ella __________ (tener) sed.

What is tiene

300
Translate: I put the book on the table.
What is 'Pongo el libro en la mesa'
300
Él __________ (ser/estar) muy alegre hoy.
What is está
300
Usted ___________ (saber/conocer) a María. Son amigos.
What is conoce
300
Ellos ___________ (hablar) con sus amigos.
What is están hablando
400

Ellos __________ (querer)las uvas.

What is quieren

400

Translate: I am smart.

What is 'Yo soy inteligente/listo'

400
Yo ____________ (ser/estar) un estudiante.
What is soy
400
Yo ___________ (saber/conocer) el abecedario (the alphabet).
What is sé
400
Nosotros _____________ (comer) una manzana.
What is estamos comiendo
500
Vosotros ____________ (dormir) mucho.
What is dormís
500
Translate: I bring food to the party.
What is 'Traigo la comida a la fiesta'
500

Translate: The class is in the library. 

What is La clase está en la biblioteca. 

500
Nosotros _____________ (saber/conocer) escribir un ensayo.
What is saber.
500
Translate: I am going to the beach.
What is Estoy yendo a la playa.
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