Ar Ir And Er Verbs In Spanish | Endings That Finally Stick

Spanish verbs fall into three ending groups, and once you learn the stem + ending pattern, you can form dozens of correct sentences fast.

If you’re learning Spanish, verbs can feel like the whole game. Good news: a huge chunk of everyday Spanish runs on three regular patterns. They’re named by the last two letters of the infinitive: -ar, -er, and -ir.

This post is built to make those patterns feel steady in your hands. You’ll learn how to spot the group, make the stem, add the right endings, and dodge the small traps that trip people up. You’ll also see when -er and -ir behave like twins, and when they don’t.

What Ar, Er, And Ir Verb Endings Mean

In Spanish, the infinitive is the “dictionary form” of a verb, like hablar (to speak), comer (to eat), or vivir (to live). The last two letters tell you which conjugation pattern the verb uses.

• -ar verbs end in -ar: hablar, trabajar, estudiar.
• -er verbs end in -er: comer, beber, aprender.
• -ir verbs end in -ir: vivir, escribir, abrir.

Regular verbs follow a predictable stem + ending system. Irregular verbs bend the stem, endings, or both. Start with regulars and you’ll still get a lot of mileage.

How Conjugation Works: Stem Plus Ending

Conjugation sounds fancy. The mechanic is simple: cut off -ar, -er, or -ir and keep what’s left. That’s your stem. Then attach an ending that matches the subject.

Here’s what that looks like:

• hablar → stem habl-
• comer → stem com-
• vivir → stem viv-

Now you can plug in endings. If you learn endings in tidy sets, your brain stops treating each verb like a new puzzle.

Ar Ir And Er Verbs In Spanish: The Core Endings

Most beginners meet these patterns first in the present tense. It’s the tense you use for “I speak,” “she eats,” “we live,” plus habits and general truths.

Present Tense Endings You’ll Use Daily

These are the standard present endings:

• -ar: o, as, a, amos, áis, an
• -er: o, es, e, emos, éis, en
• -ir: o, es, e, imos, ís, en

Spot the pattern: -er and -ir match in four out of six forms. The “we” and “you all” forms are where they split: emos/éis vs imos/ís.

Mini Builds That Make The Pattern Click

Try one verb from each group:

• hablar:hablo, hablas, habla, hablamos, habláis, hablan
• comer:como, comes, come, comemos, coméis, comen
• vivir:vivo, vives, vive, vivimos, vivís, viven

Say them out loud once. The rhythm helps. Spanish endings have a “beat,” and hearing it matters.

Subject Pronouns And When Spanish Drops Them

Spanish often skips subject pronouns because the verb ending already carries the subject. You can say hablo without yo and it still means “I speak.”

So why keep pronouns at all? Use them when you need contrast, clarity, or emphasis:

• Yo trabajo, tú descansas. (Contrast.)
• Él vive aquí. (Clear who “he” is.)
• Nosotros comemos temprano. (Emphasis.)

In speech, pronouns show up more when there’s a risk of confusion, like with usted and él/ella, since they share verb forms.

Past Tense Basics Without Getting Lost

Once present tense feels steady, the next jump is usually the two common past tenses: one for completed actions, one for background or ongoing past actions.

Completed Actions: Preterite Endings

These endings tell a “finished event” story: you did it, it happened, it’s done.

• -ar: é, aste, ó, amos, asteis, aron
• -er/-ir: í, iste, ió, imos, isteis, ieron

Background Or Ongoing Past: Imperfect Endings

These endings set the scene: what you used to do, what was going on, what things were like.

• -ar: aba, abas, aba, ábamos, abais, aban
• -er/-ir: ía, ías, ía, íamos, íais, ían

Notice how -er and -ir match again in both of these past patterns. That “twin” idea keeps paying off.

Endings At A Glance For Regular Verbs

Use this table as your quick check when you’re writing or drilling. Learn one row at a time, then stack them.

Tense Or Form	-ar Endings	-er / -ir Endings
Present (yo → ellos)	o, as, a, amos, áis, an	o, es, e, emos/imos, éis/ís, en
Preterite (yo → ellos)	é, aste, ó, amos, asteis, aron	í, iste, ió, imos, isteis, ieron
Imperfect (yo → ellos)	aba, abas, aba, ábamos, abais, aban	ía, ías, ía, íamos, íais, ían
Present subjunctive (yo → ellos)	e, es, e, emos, éis, en	a, as, a, amos, áis, an
Affirmative tú command	a	e
Gerund (-ing form)	ando	iendo (sometimes yendo)
Past participle	ado	ido
Nosotros present marker	-amos	-emos / -imos

If you want official model charts you can trust, the Real Academia Española keeps reference materials for standard verb models. See modelos de conjugación verbal for the regular patterns and the standard templates.

Spelling Rules That Keep Regular Verbs Looking Right

Some verbs are regular in endings, yet spelling shifts show up to keep the sound consistent. This is not random. Spanish spelling tries to keep pronunciation stable.

C, G, And Z Changes Before E

When a stem ends in c, g, or z, Spanish may swap the letter in some forms so the sound stays the same before e.

• c → qu:buscar → busqué
• g → gu:llegar → llegué
• z → c:empezar → empecé

These show up a lot in the yo form of the preterite and in some subjunctive forms.

Y In Gerunds When Two Vowels Collide

Some -er and -ir verbs form the gerund with -yendo so the word doesn’t get clunky: leer → leyendo, oír → oyendo.

If you want a clean, official set of full conjugation tables (regular models included), the RAE student dictionary appendix is a solid reference: Conjugaciones verbales (PDF).

Common Mix-Ups With -Er And -Ir Verbs

Because -er and -ir look so similar, learners mix them most in the “we” and “you all” forms in present tense.

Two Fixes That Work Fast

• Say the infinitive out loud right before you conjugate. If you hear -ir, your nosotros form is -imos, not -emos.
• Anchor one verb per group in your memory. Many people pick hablar, comer, vivir. Then they copy the pattern.

Also watch stress marks in vosotros forms: habláis, coméis, vivís. The accent is part of the spelling.

Practice Method That Stops The “Blank Page” Feeling

It’s easy to “know” endings and still freeze mid-sentence. The fix is short drills that force recall, not recognition.

Step 1: Micro Drills With One Verb

Pick one verb. Conjugate it across the six people in present tense. Do it from memory. Then check. Repeat with a second verb in the same group.

Step 2: Swap Only The Stem

Keep the endings identical. Swap stems fast: habl-, trabaj-, estudi-. Your brain starts seeing the ending set as one unit.

Step 3: Add A Tiny Sentence Frame

Use a simple frame and plug in the conjugated verb:

• Hoy yo ____ en casa.
• Ahora ella ____ arroz.
• Los domingos nosotros ____ temprano.

If you want extra drills laid out by verb type, UT Austin’s LAITS practice pages break regular verbs into clear exercise sets: Regular verbs practice (Beginning Task 06).

Patterns That Show Up As You Level Up

Once regular endings are steady, you’ll notice two big themes in real Spanish: stem-changing verbs and spelling changes. These are not “new endings.” Endings stay the same, yet the stem may shift in certain persons.

This post stays centered on regular verbs, yet it helps to know what’s coming so you don’t blame yourself when a verb breaks the pattern.

Stem Changes Often Stay In A “Boot” Shape

Many stem changes show up in yo, tú, él/ella/usted, ellos/ellas/ustedes, while nosotros and vosotros keep the plain stem in present tense. You’ll see this with verbs like pensar and dormir.

-Ir Verbs Often Have Extra Stem Change Spots

Some -ir stem-changers shift in nosotros and vosotros too. That’s one of the few times -ir behaves differently in a noticeable way.

Cheat Sheet For Regular And Near-Regular Patterns

This table rounds up the most common “wait, why did that change?” moments. Use it as a check when a form looks odd but still follows a rule.

Pattern	What Changes	Sample Verb
c → qu before é	Spelling shifts to keep the hard “k” sound	buscar → busqué
g → gu before é	Spelling shifts to keep the hard “g” sound	llegar → llegué
z → c before é	Spelling shifts to keep the “th/s” sound	empezar → empecé
gerund vowel + vowel	-iendo may switch to -yendo	leer → leyendo
-er/-ir twin endings	Four present forms match, two differ	comemos vs vivimos
accent in vosotros present	Written accent marks stress	habláis, coméis, vivís
past participle endings	-ado for -ar, -ido for -er/-ir	hablado, comido, vivido

A Clean Way To Self-Check Before You Hit “Send”

When you write Spanish, fast self-checks save time. Here’s a simple loop that works on a text message, a homework paragraph, or a journal entry.

Check 1: Find The Infinitive Ending

Spot -ar, -er, or -ir. If you can’t see it, you’re not starting from the infinitive.

Check 2: Confirm The Subject

Ask, “Who’s doing it?” If the subject is nosotros, you’ll need -amos, -emos, or -imos depending on the group and tense.

Check 3: Scan For A Spelling Rule Trigger

If the stem ends in c, g, or z and you’re attaching an ending that begins with e, double-check the spelling rule list.

Small Wins That Build Real Fluency

Regular verbs are not “baby Spanish.” They’re core Spanish. When you can conjugate them without pausing, you stop translating word-by-word and start building sentences in real time.

Pick a short goal for this week: master present tense endings for one group. Then add a second group. Then add preterite endings. Each layer makes the next one easier, since Spanish repeats patterns across tenses.

Once these are in place, irregular verbs feel less like chaos. You’ll see what stayed the same and what changed, and you’ll learn them faster.