How to Say "they think" in Spanish
The most common Spanish word for “they think” is “creen” — use 'creen' when expressing a belief, opinion, or supposition about something, similar to saying 'they believe' or 'they suppose.'.
creen
KREH-enˈkɾe.en

Examples
Ellos creen que es una buena idea.
They think that it's a good idea.
¿Por qué creen que el proyecto fracasó?
Why do they think the project failed?
Los expertos creen que la economía mejorará pronto.
The experts think the economy will improve soon.
Expressing Opinions with 'que'
To share an opinion, the structure is simple: 'creen que' + the idea. For example, 'Creen que el libro es interesante' (They think that the book is interesting).
A tricky verb change for negative opinions
Mistake: “No creen que es posible.”
Correction: No creen que sea posible. (They don't think it's possible.) When you say you *don't* believe something, Spanish often requires a special verb form (the subjunctive) for the thing you doubt.
piensan
pee-EN-sahnˈpjɛn.san

Examples
¿Qué piensan ustedes sobre el nuevo plan?
What do you all think about the new plan?
Ellos piensan viajar a España este verano.
They are planning (or thinking of) traveling to Spain this summer.
Mis amigos piensan que la película fue aburrida.
My friends believe that the movie was boring.
The E → IE Change
The vowel 'e' changes to 'ie' in almost all forms of the present tense (like 'pienso,' 'piensan,' 'piensas'), but not for 'nosotros' or 'vosotros' (pensamos, pensáis).
Thinking ABOUT vs. Thinking OF/BELIEVING
To talk about the subject you are mentally focusing on, use 'pensar en' (Ellos piensan en el futuro). To give an opinion, use 'pensar que' (Ellos piensan que es tarde).
Forgetting the Stem Change
Mistake: “Mis padres pensan ir.”
Correction: Mis padres piensan ir. Remember the vowel change (e becomes ie) in this form.
Mixing Prepositions
Mistake: “Piensan sobre el trabajo.”
Correction: Piensan en el trabajo. Use 'pensar en' when meaning 'to meditate on' or 'focus on'.
Belief vs. Cognitive Act
Related Translations
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