Cytat: Quirk et al
Informally, with indefinite pronoun subjects, they is commonly used in subsequent tag question:
> Everybody is leaving, aren't they?
> Nobody is leaving, are they?
Jeśli użycie
they jest nieformalne, to jaka jest formalna alternatywa?
He?
Cytat: Quirk et al
In formal Englsih, the tendency has been to use he as the unmarked form when the gender is not determined
A może chodzi o to, że
question tags są nieformalne? Pomożecie, proszę?