tu perds ton temps

you're wasting your time

→ tu
phrase Rare #38,119
you're wasting your time An informal expression used to tell someone that their effort is pointless or unlikely to succeed. It can be followed by à and an infinitive to say what they are wasting time doing.
FR: Tu perds ton temps à attendre une réponse.
EN: You're wasting your time waiting for an answer.

Je pense que tu perds ton temps.

I think you're wasting your time.

Tu perds ton temps.

You're wasting your time.

— Moulin Rouge ! (2001)

Tu perds ton temps!

You're wasting your time!

— Le Vent se lève (2013)

Tu perds ton temps à essayer de convaincre Tom.

You’re wasting your time trying to convince Tom.

Ne le leur explique pas; tu perds ton temps.

Don't explain it to them; you're wasting your time.

Tu perds ton temps à essayer de le convaincre.

You're wasting your time trying to convince him.