since yesterday
J'ai un mal de tête depuis hier.
I've had a headache since yesterday.
Depuis hier, c'est pour ma thèse.
It’s been for my thesis since yesterday.
— The Magnificent One (1973)
Not since yesterday.
Je ne l'ai pas vu depuis hier.
I haven't seen him since yesterday.
Le téléphone du bureau est en panne depuis hier.
The office phone has been out of order since yesterday.
Tom et Marie habitent depuis hier en France.
Tom and Marie have been living in France since yesterday.
Tom n'a rien mangé depuis hier.
Tom hasn't eaten anything since yesterday.
He turned eight yesterday.
Je n'ai rien mangé depuis hier.
I haven't eaten anything since yesterday.