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QUICK ANSWER
"Que descanses" is a phrase which is often translated as "sleep well", and "dormir bien" is an intransitive verb phrase which is often translated as "to sleep well". Learn more about the difference between "que descanses" and "dormir bien" below.
que descanses(
keh
 
dehs
-
kahn
-
sehs
)
A phrase is a group of words commonly used together (e.g., once upon a time).
phrase
a. sleep well
Buenas noches, hijo. Que descanses.Good night, son. Sleep well.
b. sweet dreams
Yo me voy a la cama. - Muy bien. Que descanses, cielo.I'm going to bed. - Okay. Sweet dreams, sweetheart.
a. to rest
El médico te ha dicho que descanses.The doctor asked you to rest.
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dormir bien(
dohr
-
meer
 
byehn
)
An intransitive verb phrase is a phrase that combines a verb with a preposition or other particle and does not require a direct object (e.g., Everybody please stand up.).
intransitive verb phrase
a. to sleep well
¡Buenos días, chicos! ¿Durmieron bien?Good morning, guys! Did you sleep well?
b. to get a good night's sleep
"Si por lo menos durmiera bien," pensaba la exhausta Laura mientras amamantaba a su bebé."If only I could get a good night's sleep," thought an exhausted Laura while she breastfed her baby.
c. to sleep tight
Buenas noches. Que duermas bien.Good night. Sleep tight.
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