freír

Freír means to fry (in oil) — a cooking verb you cannot avoid in Spain, where patatas fritas, huevos fritos, calamares fritos, and pescaíto frito all run through it. It is also a B1-level minefield, because three things are happening at once in its paradigm:

1. An e > i stem change in the same "boot" pattern as pedir, servir, repetir, seguir (singular and 3pl in the present indicative/subjunctive, plus a couple of preterite/gerund effects).
2. An obligatory written accent on the stem í whenever it appears next to another vowel — frío, fríes, fríe, fríen, freí, freímos, freís — because the stress falls on the i of the stem in those forms and Spanish orthography requires that to be marked when the i would otherwise diphthongise with a neighboring vowel.
3. Two participles: the irregular frito (which dominates as an adjective and increasingly as the auxiliary participle too) and the regular freído (which the RAE still accepts after haber in compound tenses).

The same triple-pattern governs reír (to laugh) and sonreír (to smile) — so once you have freír, you essentially have those two as well.

Non-finite forms

The infinitive itself takes the accent: freír, never freir. The two vowels e and i are in hiatus (separate syllables: fre-ír) and the i is stressed, so by Spanish orthographic rules it must carry an accent.

The gerund is friendo — the e of the stem changes to i in the gerund just like in pidiendo, sirviendo, durmiendo. There is no accent here because the i sits next to e in a normal diphthong/triphthong arrangement that does not require one.

Indicative — simple tenses

Presente

This is where everything happens at once. The "boot" pattern shows the e > i stem change in every form except nosotros and vosotros: frío, fríes, fríe, fríen on the inside; freímos, freís on the outside. And every form that contains í next to another vowel takes the accent: frí-o, frí-es, frí-e, frí-en in the boot; and even the nosotros/vosotros forms (which keep e in the stem) take the accent because the í of the -ír ending is stressed and sits in hiatus: fre-í-mos, fre-ís.

In other words: every single form of the present indicative carries a written accent on the i. There are no exceptions in this tense.

Pretérito perfecto simple

Two things to flag:

• The yo, tú, nosotros, and vosotros forms keep an accent on the í of the stem next to -e-: fre-í, fre-íste, fre-í-mos, fre-ís-teis. The accent is structural — without it, the syllable boundaries collapse.
• The él/ella/usted form is officially frio (with no accent at all) under the 2010 Ortografía of the RAE, because frio is a monosyllable (frio, one syllable: /frjo/), and Spanish monosyllables are unaccented. Many Spaniards still write frió with the accent (the older spelling that the RAE now considers optional but discouraged in formal use), and both forms are widely seen. Throughout this guide we list the modern recommended form first.
• The ellos form is frieron — the e > i stem change of -ir stem-changers shows up in the 3rd person preterite, exactly like pidió/pidieron, sirvió/sirvieron, durmió/durmieron.

Pretérito imperfecto

The imperfect of -ir verbs is regular and takes endings -ía, -ías, -ía, -íamos, -íais, -ían — and the accent on the í of every ending is mandatory across the board (like all -er and -ir imperfects). Note no stem change here: the e stays as e in every form.

Futuro simple

The future is regular and built off the full infinitive freir- (without the accent on the í, because in the future the stress is on the ending -é, -ás, etc., not on the i of the stem). No accent on the stem, accents on the endings (-é, -ás, -á, -emos, -éis, -án).

Condicional

Same logic as the future: regular endings on the unaccented infinitive stem.

Indicative — compound tenses

Compound tenses pair haber with the past participle. Freír has two valid participles. The traditional rule was frito as adjective (patatas fritas), freído with haber (he freído patatas) — but actual usage in Spain massively prefers frito even after haber. The RAE recognizes both; we list frito as the default with freído as an explicit alternative.

Pretérito perfecto compuesto

Alternative with the regular participle: he freído, has freído, ha freído... — accepted but less common in spoken Spain.

Pretérito pluscuamperfecto

Futuro compuesto

Condicional compuesto

Subjunctive — simple tenses

Presente de subjuntivo

The present subjunctive of freír is tricky. The e > i stem change appears in every form (unlike the present indicative, which spared nosotros/vosotros) — because -ir stem-changers extend the stem change throughout the subjunctive. So yo fría, tú frías, él fría, ellos frían take the accented í in the boot (where i is stressed and next to another vowel), and the nosotros/vosotros forms friamos, friais keep the i but lose the accent — those forms are stressed on the -a- of the ending (fri-A-mos, fri-AIS), so the i is unstressed and doesn't take an accent.

Practical summary: fría, frías, fría, friamos, friais, frían — accents only in the boot.

Imperfecto de subjuntivo (-ra / -se)

Built off the 3pl preterite stem frie- (just like every Spanish imperfect subjunctive). The e > i stem change carries over from the preterite. Friera, friese are both standard; -ra dominates in Spain. The nosotros forms take an accent on the -é- of the ending (frié-ramos, frié-semos).

Subjunctive — compound tenses

Pretérito perfecto de subjuntivo

Pluscuamperfecto de subjuntivo

Imperative

The imperative follows the stem-change pattern: fríe (tú) and the usted/ustedes/nosotros forms keep the e > i change with the accented í of the boot. The vosotros affirmative is freíd (no stem change, accent on the í of the stem because of the hiatus e-í). The negative vosotros uses the subjunctive stem friais without an accent.

With attached pronouns: fríelo, fríelos, fríemelos, freídlo, freídnoslos. The vosotros form freíd drops its final -d before reflexive -os: freíos un huevo, though freír rarely takes the reflexive in this sense.

The two participles: frito vs freído

The strict prescriptive rule used to be: frito only as an adjective, freído only with haber. In practice, most native speakers in Spain say and write he frito los huevos without thinking twice, and the RAE has accepted this as fully correct since the Nueva gramática. Freído still appears in careful writing, especially when there might be ambiguity (Los huevos han sido freídos, in a more impersonal/passive register), but for active haber + participle, frito dominates.

What you must never do is mix it up the other way: never say patatas freídas — that is wrong. As an adjective, the participle is rigidly frito/frita/fritos/fritas.

Meanings beyond "to fry"

Freír has two productive idiomatic uses in Spain worth knowing:

Quedarse frito (to fall asleep, to pass out) and estar frito (to be done for) are both essential conversational Spanish. They occupy the same semantic space as English to be toast / to be fried — interestingly close, but the metaphor mapping is independent.

High-frequency collocations from peninsular Spanish

In Spain, patatas fritas covers both chips (the hot, freshly-fried potatoes you get with a steak) and crisps (the bag of patatas fritas de bolsa at the bar). Context disambiguates: unas patatas fritas con el filete = chips; una bolsa de patatas fritas = crisps.

The classic English-speaker error

English speakers reliably get the accent on í wrong. Either they forget it entirely (writing frio, fries, frie, frien and frei, freiste — all wrong), or they sprinkle it inconsistently. The rule is mechanical and worth memorising as a block:

• Always accented: freír (infinitive), frío, fríes, fríe, fríen (present sg + 3pl), freímos, freís (present 1pl + 2pl), freí, freíste, freímos, freísteis (preterite outside 3rd person), freía, freías, freía, freíamos, freíais, freían (imperfect — all forms), fría, frías, fría, frían (present subjunctive boot), freíd (vosotros affirmative imperative).
• Never accented: frio / frió (3sg preterite, both forms exist; modern RAE prefers frio), friendo, frito, freído, friera, friese, friamos, friais, freiré and all of the future and conditional.

A second issue: confusing the two participles. Patatas freídas is wrong; patatas fritas is right. As an adjective, the participle is rigidly irregular.

Common Mistakes

Key Takeaways

• Freír combines three difficulties: an e > i stem change in the boot, an obligatory written accent on í whenever it is stressed and in hiatus with another vowel, and two valid past participles.
• The boot in the present indicative is frío, fríes, fríe, fríen — accents mandatory. The non-boot forms freímos, freís also carry the accent because the í is stressed and in hiatus with the e before it.
• The 3sg preterite is now standardly written frio (no accent, the RAE 2010 recommendation), though frió (with accent) is still widely seen and accepted.
• The 3pl preterite is frieron (with e > i); the imperfect subjunctive uses the same stem (friera, friese).
• Two participles: frito (irregular) for adjective use — patatas fritas — and increasingly for compound tenses (he frito); freído (regular) is also accepted with haber but less common in spoken Spain. As an adjective, never freído.
• The peninsular vosotros affirmative imperative is freíd (with accent); the negative is no friais.
• Quedarse frito (to fall asleep) and estar frito (to be done for) are essential idioms in spoken Spain.