introduce themselves, show up, arise, come up
Perdone que le hable antes de que nos presenten formalmente.
Excuse me for speaking to you before we are formally introduced.
— Русский ковчег (2002)
¡Es mejor que los asesinos se presenten!
The killers had better turn themselves in!
— Fresas salvajes (1957)
Diles que se presenten ellos mismos.
Tell them to introduce themselves.
Tendremos que afrontar todos los obstáculos que se nos presenten.
We’ll have to overcome every obstacle that comes our way.