was thirteen years old when
Eu tinha treze anos quando escrevi aquilo.
I was thirteen years old when I wrote that.
O Tom tinha treze anos quando ele se mudou daqui para Boston.
Tom was thirteen years old when he moved from here to Boston.
Tom tinha treze anos quando morreu.
Tom was thirteen years old when he died.
O Tom tinha treze anos quando se mudou daqui para Boston.
Tom was thirteen years old when he moved from here to Boston.