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"Si" is a form of "si", a conjunction which is often translated as "if". "Qué bien" is an interjection which is often translated as "that's great". Learn more about the difference between "si" and "qué bien" below.
si(
see
)
A conjunction is a word that connects words, phrases, clauses, or sentences (e.g., The cat and the dog slept.).
conjunction
a. if
Si llueve mañana, cancelaremos el pícnic.If it rains tomorrow, we will cancel the picnic.
a. whether
Preguntó si me estaba divirtiendo.He asked whether I was enjoying myself.
b. if
Paco quiere saber si Laura también va a asistir.Paco wants to know if Laura is also going to attend.
A masculine noun is used with masculine articles and adjectives (e.g., el hombre guapo, el sol amarillo).
masculine noun
a. B
Primero lo oí en si menor.I first heard it played in B minor.
b. ti (solfége)
Practiquemos las escalas en orden inverso: do, si, la...Let's practice scales in reverse order: do, ti, la...
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qué bien(
keh
 
byehn
)
An interjection is a short utterance that expresses emotion, hesitation, or protest (e.g., Wow!).
interjection
a. that's great
Conseguimos la casa que queríamos. - ¡Qué bien!We got the house we wanted. - That's great!
b. that's good
Vamos a pasar Semana Santa con mi familia en Querétaro. - ¡Qué bien!We're going to spend Easter vacation with my family in Queretaro. - That's good!
c. how nice
¡Estoy en el cuadro de honor! - ¡Qué bien!I'm on the honor roll! - How nice!
A phrase is a group of words commonly used together (e.g., once upon a time).
phrase
a. how nice
Estefanía, qué bien que hayas venido.Estefania, how nice that you came.
a. so well
¡Qué bien bailas!You dance so well!
b. how well
Ya es hora de enseñarle al mundo qué bien cantas.It's time to show the world how well you sing.
c. how good
Nunca se me olvidará qué bien huelen las galletas de mi abuela.I'll never forget how good my grandmother's cookies smell.
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