Reciprocal se (each other) in Spanish (B1)

what is it?

A reciprocal construction expresses an action that two or more people perform on each other simultaneously. In Spanish, this is expressed with the plural reflexive pronouns nos, os, and se — the same pronouns used for reflexive actions — paired with a plural subject. For example, se quieren can mean either «they love themselves» (reflexive) or «they love each other» (reciprocal). Context usually makes the meaning clear; when it does not, a clarifying phrase such as el uno al otro or entre sí is added.

when to use it

The subject is plural. Reciprocal meaning requires at least two participants: nosotros, vosotros, ellos, ellas, or a plural noun phrase.
The verb describes an action that can logically be mutual. Common verbs include conocer, ayudar, querer, escribir, llamar, ver, mirar, hablar, and similar transitive verbs.
Disambiguation is needed. When the reflexive and reciprocal readings are both plausible, add el uno al otro / la una a la otra (for two people) or entre sí (for groups) after the verb: se miraron el uno al otro.

formation

Place the reciprocal pronoun directly before the conjugated verb. The pronoun agrees with the subject, not with any object. Only the three plural persons are possible.

subject	pronoun	example	meaning
nosotros / nosotras	nos	nos ayudamos	we help each other
vosotros / vosotras	os	os conocéis	you (pl.) know each other
ellos / ellas / ustedes	se	se quieren	they / you (formal pl.) love each other

The verb is conjugated normally for its subject. There is no change to the verb ending itself — only the pronoun signals reciprocity.

Clarifying phrases: El uno al otro and entre sí are optional additions, never replacements for the pronoun. The pronoun must always be present.

examples in context

Nos escribimos todas las semanas.

We write to each other every week.

First-person plural: nos signals that the writing goes in both directions.

Mis padres se conocieron en la universidad.

My parents met each other at university.

Third-person plural subject with se; the preterite tense marks the moment they first met.

Las hermanas se ayudan la una a la otra.

The sisters help each other.

The phrase la una a la otra is added for clarity because both a reflexive and a reciprocal reading are possible.

¿Os conocéis?

Do you know each other?

Second-person plural (vosotros) with os; common in everyday conversation.

Se miraron el uno al otro.

They looked at each other.

Without el uno al otro, se miraron could also mean «they looked at themselves»; the phrase removes the ambiguity.

common pitfalls

Dropping the pronoun entirely. The reciprocal pronoun is obligatory. Without it the sentence is ungrammatical or loses its reciprocal meaning.
✗ Mis padres conocieron en 1990. — pronoun missing
✓ Mis padres se conocieron en 1990.
Calquing English «each other» without se. In Spanish, the clarifying phrase el uno al otro supplements the pronoun — it never replaces it.
✗ Ellos quieren el uno al otro. — se is missing
✓ Se quieren (el uno al otro).
Using a singular pronoun with a plural reciprocal subject. When the subject is mi hermano y yo (= nosotros), the pronoun must be nos, not me.
✗ Mi hermano y yo me ayudamos. — singular pronoun with plural subject
✓ Mi hermano y yo nos ayudamos.

Quick check

Three sentences, graded here. Nothing is saved and no account is needed.

1 / 3

Mi amigo y yo nos conocimos en la iglesia del barrio, y desde entonces ___ todos los domingos. (escribir)

Fill in the blank with the correct reciprocal form of the verb in parentheses.