No. 480 in Portuguese
alguém
Someone.
In a sentence
Alguém bateu na porta.
Someone knocked on the door.
'Alguém' is an indefinite pronoun used here to indicate an unspecified person.
Eu ouvi alguém chamando meu nome.
I heard someone calling my name.
'Alguém' is specifically used as the object of the verb 'ouvir', again referring to an unidentified individual.
Você conhece alguém que possa nos ajudar?
Do you know someone who can help us?
'Alguém' is used here in an interrogative context, seeking information about an unspecified but potentially existing person.
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