tu devineras jamais

you'll never guess

→ tu
phrase Rare #50,936
you'll never guess Informal spoken French often omits ne from ne... jamais.
FR: Tu devineras jamais ce qu’elle m’a dit.
EN: You’ll never guess what she told me.

Tu devineras jamais ce que le médecin m'a prescrit.

You'll never guess what the doctor prescribed me.

— Demain tout commence (2016)

Tu devineras jamais !

You’ll never guess!

— Shower (1999)

Tu devineras jamais qui c'est ?

You’ll never guess who it is!

— Santa Claus Is a Stinker (1982)

Tu devineras jamais.

You'll never guess.