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"Sí" is a form of "sí", an adverb which is often translated as "yes". "Es bastante" is a phrase which is often translated as "that's enough". Learn more about the difference between "es bastante" and "sí" below.
es bastante(
ehs
 
bahs
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tahn
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teh
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A phrase is a group of words commonly used together (e.g., once upon a time).
phrase
a. that's enough
Ya es bastante por hoy. Guarden sus violines. Mañana seguiremos practicando.That's enough for today. Put away your violins. We'll keep practising tomorrow.
b. it's enough
Si crees que es bastante, no eches más azúcar a la masa del pastel.If you think it's enough, don't put any more sugar into the cake mixture.
c. is enough
No pongas más ropa en la maleta. Eso es bastante.Don't put any more clothes in the suitcase. That is enough.
a. it's quite
Es bastante tarde. Vámonos.It's quite late. Let's go.
b. is quite
Ulises es bastante guapo.Ulises is quite handsome.
3.
A word or phrase used to refer to the second person formal “usted” by their conjugation or implied context (e.g., usted).
(formal)
(you're considerably; second person singular)
a. you're quite
Es bastante atinada en sus diagnósticos, doctora.You're quite accurate in your diagnoses, doctor.
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An adverb is a word that describes a verb, an adjective, or other adverbs (e.g., to run quickly, very tired).
adverb
a. yes
¿Quieres ir al cine? - Sí, pero primero hay que comer.Do you want to go to the movies? - Yes, but let's eat first.
a.
This refers to an idiomatic word or phrase for which there is no word-for-word translation.
no direct translation
Yo sí quiero acompañarlos a Disney.I do want to go with you to Disney World.
Ella no aprobó, pero yo sí.She didn't pass, but I did.
An interjection is a short utterance that expresses emotion, hesitation, or protest (e.g., Wow!).
interjection
a. yes
¿Quieren ir mañana a la playa? -¡Sí!Do you want to go to the beach tomorrow? - Yes!
A masculine noun is used with masculine articles and adjectives (e.g., el hombre guapo, el sol amarillo).
masculine noun
a. yes
El departamento dio el sí a la propuesta.The department said yes to the proposal.
A pronoun is a word that stands in for a noun (e.g., she).
pronoun
a. himself (third person singular masculine)
Suele jugar ajedrez con sí mismo.He usually plays chess against himself.
b. herself (third person singular feminine)
¡Se envió una carta a sí misma!She sent a letter to herself!
c. itself (third person singular)
El hilo se está enredando en sí.The string is getting tangled up in itself.
d. themselves (third person plural)
Se mienten a sí mismos.They're lying to themselves.
e. yourself (second person singular formal)
Solo desea el bien para sí.You only wish good for yourself.
f. yourselves (second person plural formal)
¡Solo tienen que creer en sí mismos!You just have to believe in yourselves!
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