Every school kid has played hooky at one time or another.
- Tout écolier a fait l'école buissonnière à un moment ou un autre.
Every high school student has ditched class at one time or other.
- Tout élève de lycée a séché un cours à un moment ou un autre.
... do all the time, so that when the moment comes, it can say, "I can't let you do that, Dave." ...
... out at the moment. ...