How to Say "somebody" in Spanish
The Spanish word for “somebody” is “alguien” — A1 level. This is a very common word in everyday Spanish.

Examples
¿Hay alguien en casa?
Is anyone home?
Alguien llamó por teléfono.
Someone called on the phone.
Necesito hablar con alguien que sepa de computadoras.
I need to talk to someone who knows about computers.
The Opposite of 'Nadie'
'Alguien' means 'someone.' Its direct opposite is 'nadie,' which means 'no one' or 'nobody'.
Always Singular, Always the Same
'Alguien' always refers to one person and never changes its spelling for plurals or gender.
Using the 'Personal a'
When 'alguien' is the one receiving an action from a verb, you usually need to put 'a' in front of it. For example, 'Vi a alguien' (I saw someone).
Using in Negative Sentences
Mistake: “No vi a alguien.”
Correction: For negative sentences, you must switch to its opposite: 'No vi a nadie' (I didn't see anyone).
Trying to Change its Gender
Mistake: “Busco a alguiena inteligente.”
Correction: The word 'alguien' never changes. It works for any person. Say: 'Busco a alguien inteligente'.
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