Quick answer
"When" is an adverb which is often translated as "cuándo", and "while" is a conjunction which is often translated as "mientras". Learn more about the difference between "when" and "while" below.
when(
wehn
)
An adverb is a word that describes a verb, an adjective, or other adverbs (e.g. to run quickly, very tired).
1. (in questions)
a. cuándo
When was the last time you cried?¿Cuándo fue la última vez que lloraste?
A conjunction is a word that connects words, phrases, clauses, or sentences (e.g. The cat and the dog slept.).
2. (relative)
a. cuando
I was sleeping when he got home.Estaba durmiendo cuando llegó a casa.
b. en que
That was the year when we bought our first apartment.Ese fue el año en que compramos nuestro primer apartamento.
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while(
wayl
)
A conjunction is a word that connects words, phrases, clauses, or sentences (e.g. The cat and the dog slept.).
1. (during)
a. mientras
I love listening to music while I clean the house.Me encanta escuchar música mientras limpio la casa.
2. (as long as)
a. mientras
You will keep your job while I am the boss.Mientras yo sea el jefe, mantendrás tu trabajo.
3. (although)
a. aunque
While he is a good match, her parents do not like him.Aunque sea un buen partido, a los padres de ella no les gusta.
4. (whereas)
a. mientras que
I love the mountains while my husband prefers the sea.Me encantan las montañas mientras que mi marido prefiere el mar.
A noun is a word referring to a person, animal, place, thing, feeling or idea (e.g. man, dog, house).
5. (time)
a. el rato
(m) means that a noun is masculine. Spanish nouns have a gender, which is either feminine (like la mujer or la luna) or masculine (like el hombre or el sol).
After a while, I realized I was on the wrong bus.Después de un rato, me di cuenta de que estaba en el autobús equivocado.
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