he had to
Il devait avoir toutes les raisons pour cela.
He must have had every reason for that.
Il devait donc y avoir des pirates aujourd’hui.
So there must have been pirates today.
Il était impuissant, il devait attendre que cette femme revienne le guider.
He was powerless; he had to wait for this woman to return and guide him.
— Mirage (2018)
Il devait ramener un fonctionnaire de l'Est, Schmidt.
He was supposed to bring back an official from the East, Schmidt.