drum something into someone
phrasal verb with drum verb [ I or T ] uk/drʌm/ us/drʌm/ -mm-
反复教（某人）…，反复向（某人）灌输…
to teach something to someone by repeating it many times
The importance of good manners was drummed into us at an early age. 我们很小就被反复叮嘱要注重行为举止。