vs 

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"What are you doing tonight" is a form of "what are you doing tonight", a phrase which is often translated as "qué haces esta noche". "So" is a form of "so", an adverb which is often translated as "tan". Learn more about the difference between "what are you doing tonight" and "so" below.
what are you doing tonight(
wuht
 
ar
 
yu
 
du
-
ihng
 
tuh
-
nayt
)
A phrase is a group of words commonly used together (e.g., once upon a time).
phrase
a. qué haces esta noche
A word or phrase used to refer to the second person informal “tú” by their conjugation or implied context (e.g., How are you?).
(informal)
A word or phrase that is singular (e.g., el gato).
(singular)
What are you doing tonight, Joe? - I have a date with Penelope.¿Qué haces esta noche, Joe? - Tengo un plan con Penelope.
b. qué vas a hacer esta noche
A word or phrase used to refer to the second person informal “tú” by their conjugation or implied context (e.g., How are you?).
(informal)
A word or phrase that is singular (e.g., el gato).
(singular)
What are you doing tonight, baby? - I am going to stay at home and relax by the fireplace.¿Qué vas a hacer esta noche, amor? - Voy a quedarme en casa y relajarme cerca de la chimenea.
a. qué hacen esta noche
A word or phrase that is plural (e.g., los libros).
(plural)
What are you doing tonight? Do you want to meet up?¿Qué hacen esta noche? ¿Nos encontramos?
b. qué van a hacer esta noche
A word or phrase that is plural (e.g., los libros).
(plural)
What are you doing tonight? - We don't have any plans.¿Qué van a hacer esta noche? - No tenemos ningún plan.
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so(
so
)
An adverb is a word that describes a verb, an adjective, or other adverbs (e.g., to run quickly, very tired).
adverb
a. tan
I'm so hungry. I haven't eaten in hours.Estoy tan hambriento. Llevo horas sin comer.
b. muy
These boots are so old. I need a new pair.Estas botas son muy viejas. Necesito un nuevo par.
a. así
To make a paper airplane, take the piece of paper and fold it so.Para hacer un avión de papel, toma la hoja y dóblala así.
b. de esta manera
Hold the brush so and just dab paint onto the canvas.Aguanta el pincel de esta manera y simplemente pon un poquito de pintura sobre el lienzo.
a. también
You're pregnant? So am I!¿Estás embarazada? ¡Yo también!
a. así
Is it possible to insert images into the document? If so, how?¿Es posible introducir imágenes en el documento? Si así es, ¿cómo?
a. y
But you promised you'd come with me! - So? I changed my mind.¡Pero habías prometido venir conmigo! - ¿Y? Cambié de opinión.
A conjunction is a word that connects words, phrases, clauses, or sentences (e.g., The cat and the dog slept.).
conjunction
a. así que
We've already finished our work, so we're just going to head home.Ya hemos terminado nuestro trabajo, así que nos vamos a casa.
a. para que
I turned on the television so my kids would stop running around.Prendí el televisor para que mis hijos dejaran de correr.
b. para
She's been saving money so she can go to Europe.Ella ha estado ahorrando dinero para poder ir a Europa.
a. entonces
So, how long have you been working at the plant?Entonces, ¿cuánto tiempo llevas trabajando en la fábrica?
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