Advanced relative clauses

A relative clause modifies a noun or pronoun (its antecedent) by adding information about it. At B2, you move beyond the basic que + indicative pattern and work with: explicative (non-restrictive) clauses set off by commas; prepositional relatives built with el/la/los/las que or quien(es); the neuter lo que for abstract or unspecified referents; donde for place relatives; and the indicative/subjunctive alternation triggered by whether the antecedent is specific and known or hypothetical and unidentified.

• Explicative (non-restrictive) clauses. Use a comma-bounded relative clause to add a parenthetical comment about an antecedent that is already fully identified. The clause could be removed without changing the core meaning of the sentence. Use que for things and people, or quien(es) for people.

• Prepositional relatives. When the relative pronoun is the object of a preposition, the preposition must come before the relative pronoun — never stranded at the end as in English. Use preposition + el/la/los/las que for things, and preposition + quien(es) for people.

• quien(es) without an antecedent. Quien can function as a free relative («whoever», «the person who») when there is no explicit noun antecedent: Quien mucho abarca, poco aprieta.

• lo que. Use the neuter lo que when the antecedent is an entire idea, an action, or something with no grammatical gender — not a specific noun.

• donde relatives. Use donde to relate to a place antecedent, especially when a preposition would otherwise be needed (e.g. en el que → donde).

• Indicative vs. subjunctive. Use the indicative when the antecedent is specific and the speaker knows it exists. Use the subjunctive when the antecedent is hypothetical, unidentified, or its existence is in doubt.

The relative pronoun must agree in gender and number with its antecedent. The table below summarises the main forms and their typical contexts.

For prepositional relatives, the structure is always: preposition + article + que (for things) or preposition + quien(es) (for people). The article agrees with the antecedent: el libro del que hablo, la mesa sobre la que escribo, los amigos con los que salgo.

For the indicative/subjunctive contrast, the verb inside the relative clause follows normal mood-selection rules: identified antecedent → indicative; unidentified or hypothetical antecedent → present subjunctive (or imperfect subjunctive in past contexts).

• Stranding the preposition (English calque). English allows the preposition to stay at the end of a relative clause: «the house I told you about». Spanish does not. The preposition must move to the front, together with the article: la casa de la que te hablé, not *la casa que te hablé or *la casa que te hablé de. Identify which preposition the verb requires (hablar de, pensar en, depender de) and place it before the relative pronoun.

• Indicative instead of subjunctive for an unidentified antecedent. When you are describing properties you want something to have — and that thing has not yet been found — the verb in the relative clause must be in the subjunctive. Saying *busco un piso que tiene terraza implies you already have a specific flat in mind. If you are still searching, use busco un piso que tenga terraza. The trigger is not the main verb but the status of the antecedent: known and specific → indicative; hypothetical or unidentified → subjunctive.

• Omitting the comma in explicative clauses. The comma is not optional punctuation — it changes the meaning. Mi vecina, que es médica, trabaja en el hospital. (explicative: I have one neighbour; she happens to be a doctor) is different from Mi vecina que es médica trabaja en el hospital. (restrictive: I have several neighbours; the one who is a doctor works at the hospital). Dropping the commas collapses an explicative into a restrictive reading and may convey unintended information.