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

Examples
Los niños siempre ríen cuando ven dibujos animados.
The children always laugh when they watch cartoons.
¿Por qué ríen? ¿Qué es tan divertido?
Why are you all laughing? What is so funny?
Ellos ríen de las desgracias de otros, lo cual no es amable.
They laugh at the misfortunes of others, which is not kind.
Who is 'Ríen'?
This form is used when you are talking about 'they' (ellos/ellas) or 'you all' (ustedes, the formal plural) doing the action of laughing right now.
The Tricky Vowel Change
The verb reír is irregular because the 'e' in the middle changes to an 'i' in most singular forms and in the 'ellos/ellas/ustedes' form (ríen). Watch out for this 'e' to 'i' switch!
Forgetting the Accent
Mistake: “Muchos reien en la clase.”
Correction: Muchos *ríen* en la clase. The accent mark (tilda) on the 'í' is essential to keep the sound correct and show the stress.
Using the 'Nosotros' Form Incorrectly
Mistake: “Nosotros ríemos mucho.”
Correction: Nosotros *reímos* mucho. The 'nosotros' form keeps the original 'e' and is regular in the present tense.
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