Las niñas les duele la cabeza.
Nosotros nos duelo la cabeza.
A ellas les duela las cabezas.
Está empezando a dolerme la cabeza.
The sentence says “ I never had to accept this job before.” Trabajo is a noun. If you are trying to say, “ I never had to work before ”, then It would be “trabajar” because it is after the verb “había”.
3rd one. duermes is the correct way to say it
