personne ne t'a

no one has

→ personne
phrase Uncommon #17,799
no one has Used with a past participle to say that nobody has done something to or for you. Here, personne is the negative subject, so pas is not used.
FR: Personne ne t'a prévenu à temps.
EN: No one warned you in time.

Je t'aime comme personne ne t'a jamais aimée.

I love you like no one has ever loved you before.

Anton, personne ne t'a donné la permission de partir.

Anton, no one gave you permission to leave.

— Day Watch (2006)

Dis-moi, personne ne t'a conseillé de faire attention et d'écouter?

Tell me, didn't anyone advise you to be careful and listen?

— Pinocchio (2019)

Personne ne t'a reconnu.

No one recognized you.

Et personne ne t'a aidé?

And no one helped you?

Personne ne t'a demandé ton avis.

No one asked for your opinion.

Personne ne t'a cru, n'est-ce pas?

No one believed you, did they?

Personne ne t'a vu entrer dans l'immeuble?

Did no one see you enter the building?

— Les Quatre Cents Coups (1959)

J'espère que personne ne t'a suivi.

I hope no one followed you.

Personne ne t'a reconnue.

No one recognized you.

Est-ce que personne ne t'a jamais aimé comme moi?

Has no one ever loved you like I do?

Personne ne t'a encore touchée?

Has no one touched you yet?

— Gangs of Wasseypur : 1ère partie (2012)

Personne ne t'a cru.

No one believed you.

J'espère que personne ne t'a vu.

I hope nobody saw you.

Personne ne t'a repéré?

Did no one spot you?

— The Host (2006)

Personne ne t'a forcée!

No one forced you!

— Secret Sunshine (2007)

Et personne ne t'a aidée?

And no one helped you?

Personne ne t'a demandé de faire ça.

No one asked you to do that.

Personne ne t'a suivi.

No one followed you.