1 We've been here for an hour.

we've been here since 4'o clock.
2 she hasn't spoken to me for 2 weeks.

She hasn't spoken to me since last week.
3. they've lived in this street for a long time.

They've lived in this street since 1970. 4. I haven't had time to do it for a few days.
I haven't had time to do it since last Monday.
5. We haven't bought a new one for many years.

We haven't bought a new one since ages.