"Does she earn money every day?"
Translation:An dtuilleann sí airgead gach lá?
There’s more than one an word. The an vs. na distinction exists for the translation of ”the”; na is used with plural nouns and singular genitive feminine nouns, and an is used with all other singular nouns. This an is an interrogative verbal particle; it is used to begin a question with most verbs that aren’t in the past indicative, as well as with six irregular verbs in the past indicative (viz abair, bí, déan, faigh, feic, and téigh).