tu le regretteras

Si tu pètes les plombs ici, tu le regretteras.

If you lose it here, you’ll regret it.

— Predator (1987)

Cela, tu le regretteras !

You'll regret that!

Il arrivera un moment où tu le regretteras.

There will come a time when you will regret it.

Tu le regretteras, sinon.

You'll regret it otherwise.

— Love Actually (2003)

Essaye maintenant, sinon tu le regretteras plus tard.

Try it now, or you'll regret it later.

Si tu ne le fais pas maintenant, tu le regretteras toute ta vie.

If you don't do it now, you'll regret it for the rest of your life.

Ne passe pas ta jeunesse à glander ou tu le regretteras plus tard.

Don't spend your youth lazing around or you'll regret it later.

Arrivera un jour où tu le regretteras.

One day, you'll regret it.