"Ate" is not a French word...But the past tense for "eat" in French is "mangé".
He ate is "il mangé"
Ate, as a past participle, is mangé in French
mangé
"Queue-Ate" (English pronunciation) "Kow-Ate" (Arabic & French pronunciation) "Koo-Ate" (American pronunciation)
In French, the preposition à is generally used in cases where we would use to, in, or at. It should be noted however that in some idiomatic expressions the French do not always use the literal translation of whatever word we would use in the same context.
she ate chicken
french fries
'on a mangé des frites' means 'we ate French fries' in French.
They became french
fat burger
max ate cheese