what is it?
A cleft sentence splits a simple clause into two parts in order to focus attention on one element. In Spanish this is done with the verb ser followed by the focused element, then a relator — a relative-like word that links the focus back to the rest of the clause. The critical rule is that the relator must match the semantic type of the focused element: quien / el que / la que for people, donde for places, cuando for times, and lo que for neuter or abstract ideas. Using plain que in all positions — a direct transfer from English «that» — is the most common anglophone error.
when to use it
Contrastive focus. Use a cleft when you want to single out one element as the answer to an implicit or explicit question: «¿Quién llamó? — Fue Juan quien llamó» (not someone else).
Corrective focus. Use a cleft to correct a false assumption: «No fue aquí donde ocurrió, fue en la plaza».
Presentational or emphatic focus. Use a cleft to introduce a key piece of information with extra weight, especially in written or formal registers.
Neuter / abstract focus. When the focused element is a whole idea or an infinitive rather than a noun, use the lo que … es pattern: «Lo que necesito es dormir».
formation
The basic template is: ser (conjugated) + [focused element] + [relator] + [rest of clause]. Ser agrees in tense with the original clause; the relator is chosen by focus type, not by grammatical gender or number of the focused noun.
| focus type | relator(s) | example cleft |
|---|---|---|
| person (subject / object) | quien · el que · la que · los que · las que | Fue Juan quien llamó. |
| place | donde | Es aquí donde nos conocimos. |
| time | cuando | Fue entonces cuando lo supe. |
| neuter / abstract idea | lo que | Lo que necesito es dormir. |
Prepositional clefts. When the focused element is governed by a preposition, that preposition must appear twice in careful written register: once before the focus and once before the relator. For example: «Es con ella con quien tienes que hablar». In informal speech the second preposition is often dropped, but omitting both is an error.
Tense of ser. Match the tense of ser to the tense of the original verb: present «es», preterite «fue», imperfect «era», etc. The verb in the subordinate clause keeps its own tense independently.
examples in context
common pitfalls
Plain «que» for all focus types. English uses «that» or «who» interchangeably in clefts, which tempts learners to write «*fue Juan que llamó». Spanish requires the type-matched relator: «fue Juan quien / el que llamó». Plain que is not a valid relator in this slot for person, place, or time foci.
Mismatched relator type. Swapping donde and cuando is a common slip: «*fue entonces donde lo supe» uses a place relator for a time focus. The rule is strict — cuando for time, donde for place, regardless of how the sentence feels in translation.
Dropping the preposition in prepositional clefts. «*Es con ella que tienes que hablar» omits the required second preposition before the relator. In careful register write «es con ella con la que / con quien tienes que hablar». Dropping the preposition entirely from the relator phrase is treated as an error in formal writing, even if it occurs in colloquial speech.
A quick self-check: before writing the relator, ask what type of thing is being focused. Person? → quien or el/la/los/las que. Place? → donde. Time? → cuando. Abstract / neuter? → lo que. If none of these fits, reconsider whether a cleft is the right construction.
Three sentences, graded here. Nothing is saved and no account is needed.
Después de correr cuarenta kilómetros, ___ necesito es descansar al menos dos días.
Fill in the blank with the correct word to complete the sentence.