vs 

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"They are" is a form of "they are", a phrase which is often translated as "ellos son". "He is" is a form of "he is", a phrase which is often translated as "es". Learn more about the difference between "they are" and "he is" below.
they are(
they
 
ar
)
A phrase is a group of words commonly used together (e.g., once upon a time).
phrase
a. ellos son
They are rich.Ellos son ricos.
b. ellos están
They are in Barcelona right now.Ellos están en Barcelona ahora mismo.
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he is(
hi
 
ihz
)
A phrase is a group of words commonly used together (e.g., once upon a time).
phrase
a. es
Don't invite Chad to the party. He is annoying.No invites a Chad a la fiesta. Es un pesado.
a. está
Where's Dad? - He is in the kitchen.¿Dónde está papá? - Está en la cocina.
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