"You must ask his assistant." in French

Il faut demander à son assistante.

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Literal Breakdown

English	French	Learn
it (masculine)	il	Learn
is necessary	faut	Learn
to ask	demander	Learn
at	à	Learn
his; her (feminine singular but followed by a vowel sound)	son	Learn
assistant (feminine)	assistante	Learn

The French translation for “You must ask his assistant.” is Il faut demander à son assistante.. The French, Il faut demander à son assistante., can be broken down into 6 parts:"it (masculine)" (il), "is necessary" (faut), "to ask" (demander), "at" (à), "his; her (feminine singular but followed by a vowel sound)" (son) and "assistant (feminine)" (assistante).