English does not mark gender on its object pronoun for things — "it" covers everything from books to buildings to ideas. Spanish, by contrast, forces a choice every time: lo for masculine, la for feminine. The pronoun's gender must match the grammatical gender of whatever it refers to, and grammatical gender in Spanish is rarely predictable from meaning. La mesa takes la not because tables are feminine in any natural sense but because the noun mesa is grammatically feminine. This page covers when to use lo and when to use la, the special cases (neuter lo, gender of abstractions, mixed-gender plurals), and the predictable points where English-speaking intuitions go wrong.
The basic rule
Singular direct objects take lo or la depending on the antecedent's grammatical gender. Plural direct objects take los or las.
| Antecedent | Singular DO | Plural DO |
|---|---|---|
| Masculine | lo | los |
| Feminine | la | las |
| Mixed gender (plural) | — | los |
—¿Compraste el pan? —Sí, lo compré esta mañana.
'Did you buy the bread?' 'Yes, I bought it this morning.' (el pan, masculine)
—¿Compraste la leche? —Sí, la compré esta mañana.
'Did you buy the milk?' 'Yes, I bought it this morning.' (la leche, feminine)
—¿Has visto a los niños? —Sí, los vi en el parque.
'Have you seen the kids?' 'Yes, I saw them in the park.' (masculine plural)
—¿Has visto a las niñas? —Sí, las vi en el parque.
'Have you seen the girls?' 'Yes, I saw them in the park.' (feminine plural)
The structural symmetry is clean: masculine vs feminine, singular vs plural, four cells, no surprises in the basic pattern.
When the antecedent's gender isn't obvious
English speakers tend to default to whatever pronoun "sounds right" in English. That doesn't work in Spanish, because the pronoun has to mirror grammatical gender, not natural gender, and not the gender of the English equivalent.
—¿Cuándo me devuelves la novela que te presté? —La estoy terminando.
'When are you giving back the novel I lent you?' 'I'm finishing it.' (la novela, feminine)
—¿Te llevas el periódico? —No, déjalo en la mesa.
'Are you taking the newspaper?' 'No, leave it on the table.' (el periódico, masculine)
—¿Has hecho la cama? —Aún no la he hecho.
'Have you made the bed?' 'I haven't made it yet.' (la cama, feminine)
The pronoun forces you to commit to the gender of every noun you reference. There's no neutral fallback for everyday things. This is the core difficulty of Spanish object pronouns for English speakers: not the forms (which are simple) but the constant gender accounting.
Mixed-gender plurals: masculine wins
When the antecedent is a group with both masculine and feminine members, the plural pronoun is masculine los. This isn't sexism encoded into grammar so much as a default — Spanish uses masculine plural as the unmarked form for mixed groups.
A mis padres los llamo todos los domingos.
I call my parents every Sunday. (mother + father → masculine plural)
A mis abuelos los visité ayer.
I visited my grandparents yesterday. (grandfather + grandmother → masculine plural)
The same applies even when the women outnumber the men. Mis primas y mi primo → los visité, even though four of five are female. Some speakers — especially younger ones — find this convention uncomfortable and try various workarounds (les visité a todos, fui a verles), but the standard rule remains masculine.
Neuter lo: pronouns with no clear antecedent
Spanish also has a neuter lo — the same form as the masculine, but referring to ideas, statements, or unspecified things rather than to a particular noun. It cannot be plural and has no feminine counterpart.
—¿Sabes que viene Pepe? —Sí, lo sé.
'Do you know Pepe is coming?' 'Yes, I know (it).' (lo refers to the whole proposition)
No lo entiendo, ¿por qué se fue?
I don't get it — why did he leave? (lo refers to the situation in general)
Eso no te lo voy a permitir.
I'm not going to allow that. (lo refers to the action, not a specific noun)
The neuter lo covers what English handles with "it," "that," "the whole thing." It is also used after the copular verbs ser and estar to refer back to a predicate:
—¿Estás cansado? —Sí, lo estoy.
'Are you tired?' 'Yes, I am.' (lo refers back to 'cansado')
—Tu hermana es muy lista. —Sí, lo es.
'Your sister is very clever.' 'Yes, she is.' (lo refers back to 'lista' even though the subject is feminine)
Crucially, this lo doesn't change to la even when the predicate adjective is feminine. The neuter form is invariable. This is one of the strangest features of lo for learners: in Lo es, the lo refers to a feminine adjective, but stays masculine-looking.
Gender of abstract nouns and infinitives
Abstract nouns have a fixed grammatical gender, which their pronouns must respect.
La libertad es un derecho. Hay que defenderla siempre.
Liberty is a right. We must always defend it. (la libertad → la)
El amor no se elige. Lo sientes o no lo sientes.
Love isn't a choice. You feel it or you don't. (el amor → lo)
Infinitives used as nouns are always masculine, so they take lo:
Fumar es malo, pero dejarlo es difícil.
Smoking is bad, but giving it up is hard. (the infinitive fumar → lo)
Lo de viajar siempre me ha gustado, pero ya no lo soporto.
The traveling thing I've always loved, but I can't stand it anymore.
"Lo de…" — the neuter with prepositional phrases
A peculiarly Spanish construction uses neuter lo with a de phrase to refer to "the matter of," "the business with," "the X thing." It's idiomatic and impossible to render literally into English.
¿Te has enterado de lo de Marta?
Have you heard the thing about Marta? / what's going on with Marta?
Lo del coche todavía no está arreglado.
The car thing still isn't sorted.
Lo de ayer fue una vergüenza.
What happened yesterday was an embarrassment.
This lo is the same neuter that turns up in lo bueno, lo malo, lo importante — Spanish uses lo as an abstract nominaliser, creating noun phrases out of adjectives and prepositional content.
The interaction with peninsular leísmo
In Spain, the masculine lo for human direct objects is often replaced by le. This is leísmo — see pronouns/leismo. The feminine la, by contrast, is NOT replaced by le in standard speech (doing so is leísmo femenino, which is non-standard).
A Juan lo vi ayer. / A Juan le vi ayer.
I saw Juan yesterday. (both standard; le is the peninsular variant)
A María la vi ayer.
I saw María yesterday. (only la is standard; le is non-standard for feminine humans)
This creates an asymmetry: peninsular Spanish offers two choices for masculine human direct objects (lo or le) but only one for feminine human direct objects (la). The la/las row stays stable; only the lo/los row competes with le/les.
Gender disagreement traps for English speakers
Some recurring stumbling blocks:
"El problema" is masculine
Despite ending in -a, el problema (and el tema, el sistema, el clima, el idioma, el mapa, el día) is masculine. The pronoun is lo.
—¿Resolviste el problema? —Sí, lo resolví anoche.
'Did you solve the problem?' 'Yes, I solved it last night.'
"La mano" is feminine
Despite ending in -o, la mano is feminine. The pronoun is la.
—¿Te has lavado la mano? —Sí, ya me la he lavado.
'Have you washed your hand?' 'Yes, I've already washed it.'
Body parts and clothing match the noun's gender
Las gafas las dejé en el coche.
The glasses, I left them in the car. (las gafas, feminine plural)
El reloj lo perdí ayer.
The watch I lost yesterday. (el reloj, masculine)
Words that look English-cognate but have different gender
La leche (the milk) is feminine; el dolor (the pain) is masculine; la sangre (the blood) is feminine; el sofá (the sofa) is masculine. English intuitions don't help.
La sangre se la limpiaron con cuidado.
They cleaned the blood (off him) carefully. (la sangre → la)
Pronoun in negative answers and quick replies
In Spanish dialogue, the object pronoun usually anchors the reply. Notice how the gender of the antecedent governs the form throughout the exchange:
—¿Has visto las llaves? —No, no las he visto.
'Have you seen the keys?' 'No, I haven't seen them.'
—¿Trajiste el vino? —No, lo olvidé en casa.
'Did you bring the wine?' 'No, I forgot it at home.'
A reply that drops the pronoun (No, olvidé) sounds incomplete in Spanish in a way it wouldn't in English. The clitic carries the gender and number of the topic; without it, the exchange feels untethered.
Common Mistakes
❌ —¿Has visto la película? —Sí, lo he visto.
Incorrect — la película is feminine; the pronoun must be la.
✅ —¿Has visto la película? —Sí, la he visto.
'Have you seen the film?' 'Yes, I've seen it.'
❌ —¿Cómo va el problema? —La estoy resolviendo.
Incorrect — el problema is masculine despite ending in -a.
✅ —¿Cómo va el problema? —Lo estoy resolviendo.
'How's the problem going?' 'I'm solving it.'
❌ —¿Sabes que se ha mudado? —Sí, la sé.
Incorrect — to refer to a proposition/statement, Spanish uses neuter lo, not la.
✅ —¿Sabes que se ha mudado? —Sí, lo sé.
'Do you know she's moved?' 'Yes, I know.'
❌ A mis primos los y las llamé.
Incorrect — mixed-gender plurals default to masculine los.
✅ A mis primos los llamé.
I called my cousins.
❌ —¿Estás cansada? —Sí, la estoy.
Incorrect — predicate-referring lo is invariable; doesn't change to la even with a feminine subject.
✅ —¿Estás cansada? —Sí, lo estoy.
'Are you tired?' 'Yes, I am.'
Key takeaways
- Lo/la (and plurals los/las) mark grammatical gender on direct objects. The pronoun must match the gender of the antecedent noun.
- Neuter lo refers to propositions, situations, and predicate adjectives. It's invariable and has no feminine counterpart.
- Mixed-gender plurals default to masculine los.
- Words that end in -a are not all feminine (el problema, el tema) and words that end in -o are not all masculine (la mano, la foto). The pronoun follows the noun, not the ending.
- In Spain, lo for masculine human direct objects has a leísta alternative le. The feminine la has no equivalent variation — using le for women is non-standard.
- A pronoun-less reply (No, olvidé) sounds incomplete in Spanish; always anchor short replies with the clitic.
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