since Monday; from Monday
I've been here since Monday.
Она перенесла встречу с понедельника на вторник.
She rescheduled the meeting from Monday to Tuesday.
Я не видел Тома с понедельника.
I haven’t seen Tom since Monday.
Я в Австралии с понедельника.
I've been in Australia since Monday.
Магазин открыт с понедельника до субботы.
The store is open from Monday to Saturday.
Том тут не был с понедельника.
Tom hasn't been here since Monday.
Том с понедельника в Австралии.
Tom has been in Australia since Monday.