it will be necessary to
We'll have to go.
Il va falloir qu'on le tienne.
We’re going to have to hold him back.
— Gramps Is in the Resistance (1983)
Il va falloir qu'on s'entende, tous les trois.
The three of us are going to have to come to an understanding.
— Carandiru (2003)
Il va falloir faire vos preuves.
You’re going to have to prove yourself.
— Le Salaire de la peur (1953)
Il va falloir qu'on se sépare.
We're going to have to split up.
Il va falloir qu'on les tue encore une fois.
We’re going to have to kill them again.
— Les Aventures de Bill et Ted (1991)