Present Tense Conjugation of Irregular Yo Verbs

In Spanish, not all verbs follow the usual conjugation rules. Some verbs are irregular only in the first person singular (yo) form of the present tense. The other forms of these verbs follow the patterns for regular -ar, -er, and -ir verbs. These verbs are also known as irregular yo verbs. These irregular yo verbs include some very common and important verbs.

Look at how the irregular yo verb hacer ("to do", "to make") changes forms:

Subject Verb Meaning
yo hago I do/make
haces you do/make
hace he does/makes
she does/makes
you (formal) do/make
hacemos we do/make
we do/make
hacéis you (plural) do/make
you (plural) do/make
hacen they do/make
they do/make
you (formal, plural) do/make

Here are some other irregular yo verbs:

Verb English Yo Form
dar to give doy
poner to put, to place pongo
saber to know
salir to leave, to go out salgo
traer to bring traigo
ver to see veo


Yo hago estos ejercicios. - I do these exercises.
Yo un poco de español. - I know a little Spanish.
Yo veo a Pablo todos los días. - I see Pablo every day.

Most verbs that end in -cer or -cir are also irregular in the first person singular (yo) form of the present tense.

Verb English Yo Form
aparecer to appear aparezco
conocer to know conozco
conducir to drive conduzco
ofrecer to offer ofrezco
producir to produce produzco
traducir to translate traduzco


Yo traduzco textos cada día. - I translate texts every day.
Yo conozco a María. - I know María.
Yo conduzco un coche. - I drive a car.

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