An raibh tú ag dul ar scoil gach lá?
Did you use to go to school every day?
Cá háit a dtéadh tú gach lá?
Where did you go every day?
Théinn ar scoil gach lá.
I used to go to school every day.
Grammar of the Main Sentence:
théinn + ar scoil + gach lá
Verb (Past Habitual) + Prepositional Phrase (ar scoil) + Time Phrase (gach lá)