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"Muy bien" is an interjection which is often translated as "very good", and "gracias a Dios" is a phrase which is often translated as "thank goodness". Learn more about the difference between "muy bien" and "gracias a Dios" below.
muy bien(
mwee
 
byehn
)
An interjection is a short utterance that expresses emotion, hesitation, or protest (e.g., Wow!).
interjection
a. very good
¡Muy bien! Lo hiciste genial!Very good! You did great!
A phrase is a group of words commonly used together (e.g., once upon a time).
phrase
a. very well
Trabajamos muy bien juntos.We work very well together.
a. alright then
Ya empieza a oscurecer, así que me voy a casa. - Muy bien. Nos vemos mañana.It's getting dark already, so I'm off home. - Alright then. I'll see you tomorrow.
b. very well
A word or phrase that is seldom used in contemporary language and is recognized as being from another decade, (e.g., cat, groovy).
(old-fashioned)
No nos queda tiempo hoy. - Muy bien; lo dejamos para mañana.We don't have enough time left today. - Very well; we'll leave it for tomorrow.
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gracias a Dios(
grah
-
syahs
 
ah
 
dyohs
)
A phrase is a group of words commonly used together (e.g., once upon a time).
phrase
a. thank goodness
Lo ingresamos por urgencias con un dolor en el pecho, pero gracias a Dios todo quedó en un susto.We took him to the emergency room with a pain in his chest, but thank goodness it was only a scare.
b. thank heavens
Acaban de llamar y están bien; solo habían tenido una avería. - ¡Gracias a Dios!They just called and they're ok. Their car just broke down. - Thank heavens!
c. thank heaven
Perdí el trabajo, pero gracias a Dios tenía unos ahorros.I lost my job, but thank heaven I had some savings.
d. thank God
Gracias a Dios que te encuentro. La jefa lleva un rato llamándote.Thank God I've found you. The boss has been calling you for a while.
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