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Published on: Grammar Bites

¿Cuáles son las diferencias entre ‘bien’, ‘buen’ & ‘bueno’?

¿Estar bien o estar bueno? ¿Buen día o bueno día? ¿Es un bien amigo o un buen amigo? Having troubles figuring out when to use ‘buen’, bueno’ and ‘bien’? Learn how to tell them apart right here: 

Bien is an adverb. We use it to modify or describe verbs, adjectives and other adverbs. It translates as ‘well, ‘ok’ and it goes after the verb.

  • Ella habla español bien. She speaks Spanish well
  • ¿Estás bien? Sí, estoy bien. Are you OK? Yes, I’m OK.
  • Ya es bien tarde; vamos a dormir. It’s pretty late; let’s go to bed.


Bueno and buen both are adjectives and mean the same: ‘good’. The difference is that when the adjective goes in front of a masculine, singular noun, we drop the final ‘o’. Thus, we use ‘buen’ before masculine, singular nouns and we use ‘bueno’ after.

Additionally, ‘bueno’ has a femenine form (‘buena’) and plural forms (‘buenos/buenas’):

  • Buen día. Good morning. / Buenos días. Good morning.
  • Él es un buen amigo. Ella es una buena amiga. Ellos son buenos amigos. He/She is a good friend. They are good friends.
  • Ellos hacen un buen trabajo. They do a good job. Su trabajo es bueno. Their job is good.
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