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"Avísanos" is a form of "avisar", a transitive verb which is often translated as "to warn". "Por favor" is a phrase which is often translated as "please". Learn more about the difference between "por favor" and "avísanos" below.
por favor(
pohr
fah
-
bohr
)A phrase is a group of words commonly used together (e.g., once upon a time).
avisar(
ah
-
bee
-
sahr
)A transitive verb is a verb that requires a direct object (e.g., I bought a book.).
1. (to inform)
a. to let know
Mi fiesta de cumpleaños es el sábado que viene. ¡Avísame si vas a venir!My birthday party is next Saturday. Let me know if you're coming!
b. to tell
Asegúrate de avisar al médico acerca de los medicamentos que tomas.Be sure to tell the doctor about the medications you're taking.
c. to notify
Hay que avisar al gobierno local antes de abrir un negocio.You must notify the local government before opening a business.
2. (to alert)
a. to warn
La sirena sonó para avisarles a todos que venía un tornado.The siren sounded to warn everyone that a tornado was coming.
a. to call
Hay que avisar a la escuela de que van a llegar tarde.We need to call the school to let them know they'll be late.
