ask him/her
Ask him yourself.
Demande-lui comment elle s'appelle, et n'utilise que son prénom féminin.
Ask her what her name is, and use only her first name.
— Une femme fantastique (2017)
Quel que soit celui qui est à la porte, demande-lui d'attendre.
Whoever is at the door, ask them to wait.
Demande-lui quand il va partir.
Ask him when he's leaving.
Ask him what he wants.
Ask him to call me!
Ask her to come.