Resultados posibles:
has alertado
-you have alerted
Antepresente para el sujeto del verbo alertar.
has alertado
-you have alerted
Antepresente para el sujeto vos del verbo alertar.

alertar

¿Por qué no nos has alertado de tu presencia?
Why didn't you alert us to your presence?
has alertado a los ingleses.
You have warned the English.
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