no conocéis a mi hermano

you don't know my brother

→ no
phrase Rare #44,417
you don't know my brother Used with vosotros, the informal plural “you,” mainly in Spain. The examples also show related forms for different subjects: no conoce (he/she/you formal), no conocen (they/you plural formal), and no conoces (you singular informal).
SP: Aunque vivís aquí, no conocéis a mi hermano.
EN: Even though you live here, you don't know my brother.