Spanish Irregular Verbs: One Verb, All Its Forms, Explained Step by Step

Every Monday, someone in my class raises a hand and asks the same question: "Lucía, why is it voy and not iro?" And every Monday I smile, because that student has just discovered the beautiful chaos of Spanish irregular verbs. Today we take one verb — ir (to go) — and dissect it like a frog in biology class. No shortcuts, no "just memorize it." We'll see the logic, the patterns, and the traps.

The verb ir is a rebel. In the present tense, it doesn't even look like itself. But once you see all its forms side by side, the chaos turns into a story. Let's start there.

Present Tense: Where Ir Loses Its Mind

Here's the full present conjugation. Notice how only nosotros and vosotros keep a hint of the infinitive:

The trap? Beginners write yo iro or

by analogy with regular -ir verbs like vivir. Wrong. The stem v- is your new best friend.

Preterite: The Fui Family

The past tense of ir is famously identical to the past tense of ser (to be). Context saves you — but you must recognize the forms instantly:

No accents anywhere in this set — a classic exam trap. Students add a tilde on fui or fue out of habit. Don't.

Future and the "Voy a" Shortcut

Good news: the future of ir is boringly regular — iré, irás, irá, iremos, iréis, irán. But in real conversation, Spaniards almost always use voy a + infinitive: voy a comer, vas a estudiar, vamos a salir. Learn both, but live in the second.

The Three Mistakes I See Every Week

1. Saying yo iro instead of yo voy — the regular-verb reflex.
2. Confusing fui (I went) with fui (I was) — same word, different verb, context decides.
3. Forgetting that vosotros vais exists — textbooks skip it, natives don't.