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QUICK ANSWER
"What are" is a phrase which is often translated as "qué son", and "what is" is a phrase which is often translated as "qué es". Learn more about the difference between "what are" and "what is" below.
what are(
wuht
ar
)A phrase is a group of words commonly used together (e.g., once upon a time).
what is(
wuht
ihz
)A phrase is a group of words commonly used together (e.g., once upon a time).