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 |
| tú | haces | you do/make |
| él ella usted |
hace | he does/makes she does/makes you (formal) do/make |
| nosotros nosotras |
hacemos | we do/make we do/make |
| vosotros vosotras |
hacéis | you (plural) do/make you (plural) do/make |
| ellos ellas ustedes |
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 | sé |
| salir | to leave, to go out | salgo |
| traer | to bring | traigo |
| ver | to see | veo |
Examples:
Yo hago estos ejercicios. - I do these exercises.
Yo sé 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 |
Examples:
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.
