1. Has Sam ever been to France before ?
R: Yes, Sam has already been to France.
2. Have your Friends ever studied physics ?
R: Yes, my Friends have ever studied physics yet.
3.Have you talked to Julie yet ?
R: No, Y have never talked to Julie.
4.Has Alex worked here yet ?
R: Yes, Alex has already worked here.
Forma Afirmativa ( Yes ) ~> Sujeito + Verbo Auxiliar ( Have, Has ) + Verbo Principal (3°p. / ed) + Complemento.
Forma Negativa ( Not ) ~> Sujeito + Verbo Auxiliar + Not + Verbo Principal (3°/ed ) + Complemento
Forma Interrogativa ( ? ) ~> Verbo Auxiliar + Verbo Principal + (3°C/ ed ) + Complemento