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"Don't know" is a form of "know", a transitive verb which is often translated as "saber". "You tell me" is a phrase which is often translated as "me dices". Learn more about the difference between "you tell me" and "don't know" below.
you tell me
A phrase is a group of words commonly used together (e.g., once upon a time).
a. me dices (informal) (singular)
A word or phrase used to refer to the second person informal “tú” by their conjugation or implied context (e.g., How are you?).
A word or phrase that is singular (e.g., el gato).
You tell me that you aren't in love with Elena, but I can see it in your eyes.Me dices que no estás enamorado de Elena, pero lo puedo ver en tus ojos.
b. me cuentas (informal) (singular)
A word or phrase used to refer to the second person informal “tú” by their conjugation or implied context (e.g., How are you?).
A word or phrase that is singular (e.g., el gato).
I always laugh when you tell me jokesSiempre río cuando me cuentas chistes.
c. me dice (formal) (singular)
A word or phrase used to refer to the second person formal “usted” by their conjugation or implied context (e.g., usted).
A word or phrase that is singular (e.g., el gato).
If you tell me what the problem is, I can help you.Si me dice cuál es el problema, le puedo ayudar.
d. me cuenta (formal) (singular)
A word or phrase used to refer to the second person formal “usted” by their conjugation or implied context (e.g., usted).
A word or phrase that is singular (e.g., el gato).
I always fall asleep when you tell me war stories, Grandpa.Siempre me duermo cuando me cuenta historias de guerra, abuelo.
b. me cuentan (plural)
A word or phrase that is plural (e.g., los libros).
I always have nightmares when you tell me scary stories.Siempre tengo pesadillas cuando me cuentan historias de miedo.
know(
no
)A transitive verb is a verb that requires a direct object (e.g., I bought a book.).
a. saber
Do you know when the next bus is leaving?¿Sabes a qué hora sale el próximo autobús?
He knows French, Spanish, and German.Sabe francés, español y alemán.
a. conocer
I know her from school, but we're not really friends.La conozco de la escuela, pero realmente no somos amigos.
a. saber
I don't know if you should walk home so late.No sé si deberías caminar sola a tu casa a esta hora.
a. saberse
Do you know the alphabet yet?¿Ya te sabes el abecedario?
He knows a lot about the American Civil War.Se sabe mucho de la guerra civil estadounidense.
An intransitive verb is one that does not require a direct object (e.g., The man sneezed.).