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QUICK ANSWER
"Don't know" is a form of "don't know", a phrase which is often translated as "no sé". "No" is a form of "no", an interjection which is often translated as "no". Learn more about the difference between "don't know" and "no" below.
don't know(
dont
no
)A phrase is a group of words commonly used together (e.g., once upon a time).
1. (general)
a. no sé
What's the score? - Don't know, don't care.¿Cuál es el resultado del partido? - No sé y no me importa.
b. ni idea
Do you think Mayra will win the election? - Don't know. I hope so.¿Crees que gane la elección Mayra? - Ni idea. Espero que sí.
c. sabe Dios
Do you think Amanda will like the meal I prepared? - Don't know. I've never met Amanda.¿Crees que a Amanda le guste la comida que preparé? - Sabe Dios. Nunca he conocido a Amanda.
d. a saber
How many tickets did you sell? - Don't know. I didn't keep track.¿Cuántas entradas vendiste? - A saber. No llevé ningún registro.
no(
no
)An adverb is a word that describes a verb, an adjective, or other adverbs (e.g., to run quickly, very tired).
1. (negation)
a. no
His new apartment is no larger than the last one.Su nuevo apartamento no es más grande que el último.
I have been dieting for a month, but I am no thinner than I was.Llevo un mes de dieta, pero no he enflaquecido nada.
An interjection is a short utterance that expresses emotion, hesitation, or protest (e.g., Wow!).
3. (negation)
An adjective is a word that describes a noun (e.g., the big dog).
4. (not any)
b. sin (used as a preposition in Spanish)
She did it all on her own, with no help at all.Lo hizo todo sola, sin ayuda de nadie.
a. no direct translation
This refers to an idiomatic word or phrase for which there is no word-for-word translation.
It says "no parking." You can't leave your car here.Dice "prohibido el estacionamiento"; no puedes dejar aquí el coche.
There's a sign on my son's door that says "no girls allowed."Hay un anuncio en la puerta de mi hijo que dice "no se admiten chicas".
6. (no way of)
a. no direct translation
This refers to an idiomatic word or phrase for which there is no word-for-word translation.
If my parents see the house like this, there's no telling what they'll do.Si mis padres ven la casa en tal estado, quién sabe lo que harán.
There's no avoiding the issue any more.Ya no se puede eludir el asunto.
A noun is a word referring to a person, animal, place, thing, feeling, or idea (e.g., man, dog, house).
b. el voto en contra (M) (politics)
(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).
The bill received 64 noes, and did not pass.La propuesta de ley recibió 64 votos en contra y fue rechazada.
