Verbos con 'yo' en -go: tener, poner, salir, hacer, venir, decir

A small but very busy family of Spanish verbs shares one quirk: in the present indicative, only the yo form is irregular, and the irregularity is always the same — an inserted -g- between the stem and the ending. The result is tengo, pongo, salgo, hago, vengo, digo, oigo, traigo, caigo, valgo. Everyone else in the paradigm behaves either fully regularly or with an additional stem change.

These verbs are foundational for two reasons. First, several of the most frequent verbs in Spanish belong to the family: tener, hacer, venir, decir all live here. Second, the -g- they pick up in the yo form propagates into the entire present subjunctive (tenga, ponga, salga, haga, venga, diga). Learning the yo-go pattern well now saves you a lot of effort later.

Why the -g-?

A brief historical detour, because it makes the pattern memorable.

In Late Latin, verbs like teneō ("I hold") and veniō ("I come") had a -eo yo ending. The vowel cluster eventually collapsed, and the consonant before it (n, l, c) reanalysed into a hardened -g- to keep the syllable pronounceable. Spanish ended up with tengo from teneō, vengo from veniō, digo from dīcō (here the c itself softened to g). Other verbs (hacer, poner, salir) joined the pattern by analogy — speakers extended the -go rule to verbs that did not historically need it, because the model felt consistent.

You do not have to remember the etymology. But knowing that the -g- is the irregularity — and that everything else in the paradigm is normal — turns ten irregular verbs into one rule.

The core family

Here are the most important members. Note that poner, salir, hacer are otherwise fully regular outside of yo; tener and venir add an e → ie stem change in the boot; decir changes e → i; oír, traer, caer insert a -y- or -ig- into other forms.

Full paradigms — six verbs, six persons

Here is what each verb actually looks like across all six persons. I have included vosotros in every table, because in Spain you will use it constantly.

Poner — fully regular outside yo

Salir — fully regular outside yo

Hacer — fully regular outside yo

Venir — yo-go plus e → ie boot

Decir — yo-go plus e → i boot

Note that the vosotros form is decís, with the stress on -í- (it carries a written accent because Spanish needs to mark the stressed i in this hiatus). The pattern is the same in venir (venís) and oír (oís).

Oír — yo-go plus a -y- in the boot

The yo-go pattern reaches into the subjunctive

This is the payoff. Every verb in the yo-go family carries its -g- into all six persons of the present subjunctive:

That is why Spanish teachers always insist on getting the yo form right first. The whole present subjunctive (and most of the imperative) hangs off it.

Verbs that look like they should join — but don't

A natural English-speaker mistake is to over-extend the -go pattern to verbs that simply do not have it.

• saber → sé (not ✱sabo or ✱sago). The yo form is the bare monosyllable sé, with an accent to distinguish it in writing from se (the reflexive pronoun).
• caber → quepo (not ✱cabo or ✱cabgo). Truly idiosyncratic — must be memorised.
• conocer / parecer / conducir → conozco, parezco, conduzco. These belong to the yo-zco family (a separate page).
• dar → doy (not ✱dago). The -y class with soy, voy, estoy.
• ver → veo (not ✱vego). Just regular plus a vestigial e.

Knowing what is not a yo-go verb is half the battle.

Common mistakes

Key takeaways

• The yo-go family takes a -g- insertion only in the yo form of the present indicative: tengo, pongo, salgo, hago, vengo, digo, oigo, traigo, caigo, valgo.
• The other persons either behave fully regularly (poner, salir, hacer, valer) or carry an additional stem change (tener, venir, decir, oír).
• Nosotros and vosotros never take the -g- in the present indicative. Tenemos, ponemos, salimos; tenéis, ponéis, salís.
• The yo-go stem extends to the entire present subjunctive: tenga, ponga, salga, haga, venga, diga through all six persons.
• Do not over-extend the rule. Saber, caber, conocer, dar, ver are irregular in different ways — memorise them individually.

Up next: the parallel yo-zco family for verbs ending in vowel + -cer / -cir.