I haven't seen him ........... ten days.
- since
- for
I haven't seen him ............... summer.
- since
- for
We have known each other ................. 1997.
- since
- for
We have known each other ...........five years.
- since
- for
Mary hasn't met her friend ............. last Friday.
- since
- for
........... when have you been in Athens?
- Since
- For
He hasn't had a shower ................ last Saturday.
- since
- last
He hasn't had a shower ........... ten days.
- since
- for
