They usually come home at 3 o'clock в прошедшем времени

They usually came home at 3 o\'clock.

Обычно они приходили домой в три часа.

Did they usually come home at 3 o\'clock?

Did they usually come home at 3 or at 4 o\'clock?

When did they usually come home?

Where did they usually come at 3 o\'clock?

Who usually came home at 3 o\'clock?

They usually came home at 3 o\'clock, didn\'t they?