Răspuns :
since arata inceputul unei durate.
Exemplu: I have been studying since 2005.
for arata durata efectiva
I have been studying for 12 years.
Deci aici iti trebuie for.
Exemplu: I have been studying since 2005.
for arata durata efectiva
I have been studying for 12 years.
Deci aici iti trebuie for.