How to Say "they changed" in Spanish
The Spanish word for “they changed” is “cambiaron” — A1 level. This is a very common word in everyday Spanish.

Examples
Ellos cambiaron de opinión después de la reunión.
They changed their minds after the meeting.
Las reglas cambiaron mucho el año pasado.
The rules changed a lot last year.
¿Por qué ustedes cambiaron de asiento?
Why did you all change seats?
The Specific Form: 'Cambiaron'
This word is the simple past tense (preterite) for 'they,' 'them,' or 'you all' (ustedes). It describes an action that started and finished at a specific point in the past, like a one-time event.
Changing One's Mind
To say someone changed their mind, Spanish uses the phrase 'cambiar de opinión' (literally: change of opinion), not just 'cambiar la mente'.
Using the wrong past tense
Mistake: “Usar 'cambiaban' (imperfect) when referring to a single, completed action.”
Correction: 'Cambiaron' is for finished actions: 'Ayer cambiaron el plan.' ('Yesterday they changed the plan.')
Related Translations
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