For,since,until,,,,,,,,,,,,for since ago

Diferencias temporales                for since ago
       
   How long have you been married?

We´ve been married since1982 (desde) (con presente perfecto.importa inicio del tiempo))

We´ve been married for thirty one years ( desde hace)(con presente perfecto,no importa  ni inicio ni final del tiempo)

We got married 31 years ago (con pasado simple)

We´ve been married until 2010 (hasta)(importa el final del tiempo)