How to Say "they killed" in Spanish
The most common Spanish word for “they killed” is “mataron” — use this form when describing a past action that has been completed and is a factual event..
mataron
/mah-TAH-rohn//maˈtaɾon/

Examples
Los testigos confirmaron que los ladrones mataron a la víctima.
The witnesses confirmed that the thieves killed the victim.
Ustedes mataron el proyecto con esa decisión tan arriesgada.
You all killed the project with that risky decision.
Mataron el tiempo esperando el tren, jugando a las cartas.
They killed time waiting for the train, playing cards.
Identifying the Subject
The '-aron' ending always tells you the action was done by 'ellos' (they, masculine/mixed), 'ellas' (they, feminine), or 'ustedes' (you all, formal).
Preterite Tense Function
This form is the simple past tense, used for actions that started and finished completely at a specific point in time (e.g., 'yesterday,' 'last week').
Preterite vs. Imperfect
Mistake: “Using 'mataban' (imperfect) when referring to a single, completed event.”
Correction: Use 'mataron' when describing a specific act of killing that finished. 'Mataban' suggests repeated or ongoing killing.
mataran
/mah-TAH-rahn//maˈtaɾan/

Examples
Si ellos mataran a la araña, yo entraría al cuarto.
If they killed the spider, I would go into the room.
Era improbable que mataran el tiempo de esa manera.
It was unlikely that they would kill time in that way.
Temía que mataran a los personajes principales en el final.
I was afraid they would kill the main characters in the finale.
The 'What If' Form
The word 'mataran' is a special form of the verb 'matar' used for imaginary situations or things you aren't sure about in the past. It's used after 'if' (si) when talking about something unlikely.
Mataran vs. Matarán
Mistake: “Confusing 'mataran' with 'matarán'.”
Correction: Use 'matarán' (with an accent) for 'they WILL kill' (certain future). Use 'mataran' (no accent) for 'they would kill' (imaginary).
Past Completed vs. Hypothetical
Related Translations
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