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"Yes" is an interjection which is often translated as "sí", and "I'll be there" is a phrase which is often translated as "estaré allí". Learn more about the difference between "yes" and "I'll be there" below.
yes(
yehs
)An adverb is a word that describes a verb, an adjective, or other adverbs (e.g., to run quickly, very tired).
An interjection is a short utterance that expresses emotion, hesitation, or protest (e.g., Wow!).
A noun is a word referring to a person, animal, place, thing, feeling, or idea (e.g., man, dog, house).
I'll be there(
ayl
bi
thehr
)A phrase is a group of words commonly used together (e.g., once upon a time).
a. estaré allí
What time do you think you can be at the station? - I'll be there at six.¿A qué hora crees que puedes estar en la estación? - Estaré allí a las seis.
b. estaré ahí
Wait for me, please. I'll get the car and I'll be there in ten minutes.Por favor, esperadme. Tomaré el carro y estaré ahí en diez minutos.