does one's best
Il a fait de son mieux pour l'aider.
He did his best to help her.
She's doing her best.
Elle a toujours fait de son mieux pour leur rendre la vie plus facile.
She always did her best to make their lives easier.
My father did his best.
Nul doute, mon suzerain, si chacun fait de son mieux.
No doubt, my liege lord, if everyone does their best.
— Henry V (1989)
Il a fait de son mieux, ou il n'aurait pas gagné le premier prix.
He did his best, or he wouldn't have won first prize.
He's doing his best.
Elle a fait de son mieux pour l'aider.
She did her best to help him.
Chaque joueur a fait de son mieux.
Every player did their best.
Il a fait de son mieux pour moi.
He did his best for me.