vs 

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"Yes" is an interjection which is often translated as "sí", and "I know it" is a phrase which is often translated as "lo sé". Learn more about the difference between "yes" and "I know it" below.
yes(
yehs
)
An adverb is a word that describes a verb, an adjective, or other adverbs (e.g., to run quickly, very tired).
adverb
a.
Do you want coffee? - Yes, but just a little bit.¿Quieres café? - Sí, pero solo un poquito.
An interjection is a short utterance that expresses emotion, hesitation, or protest (e.g., Wow!).
interjection
a.
Yes! I knew I was right!¡Sí! ¡Sabía que tenía razón!
A noun is a word referring to a person, animal, place, thing, feeling, or idea (e.g., man, dog, house).
noun
a. el sí
(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).
(M)
Vote "yes" to the construction of the new school.Vota "sí" para la construcción de la nueva escuela.
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I know it(
ay
 
no
 
iht
)
A phrase is a group of words commonly used together (e.g., once upon a time).
phrase
a. lo sé
Were you asking if someone has the code for the lock? I know it.¿Estuviste preguntando si alguien sepa el código para la cerradura? Lo sé.
a. lo conozco
This is the right route home. I know it.Ésto es el camino correcto hacia nuestra casa. Lo conozco.
a. lo entiendo
Mom gets angry when she feels misunderstood. I know it.Mi madre está enojada cuando siente que sus palabras sean malentendidas. Lo entiendo.
a. lo reconozco
I haven't heard that song in years, but I know it.No he oído esa canción hace años, pero la reconozco.
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