They`ve lived in this house for six months.                                                       Mr Smith has had this car for years.                                                                 Shes been in our class since October.                                                            I havent seen John for days.                                                                            I havent seen John since Monday.  They haven`t been in Italy since1998.
Theyve been in Italy for a week.
Janet has worked in this office since 1994.
I havent talked to David since last week.