mens-tu

are you lying

→ mentir
phrase Rare #41,807
are you lying Question form with subject-verb inversion; more common in formal writing than in everyday spoken French.
FR: Mens-tu à tes parents ?
EN: Are you lying to your parents?

Pourquoi leur mens-tu?

Why are you lying to them?

Mais ne mens-tu pas?

But you're not lying?

— Le repentir (1987)

Pourquoi mens-tu toujours?

Why do you always lie?

Me mens-tu?

Are you lying to me?

Pourquoi mens-tu?

Why are you lying?