1) Mr Parker hasn't went on holiday since last week.
2) It hasn't rained since Saturday.
3) Mary hasn't telephoned since she came back.
4) Robert hasn't won the first prize since he was eleven.
5) They haven't saw a play since December.
6) He hasn't ate something since 7 o'clock.
7) They haven't skated on the skating rink since January.
8) We haven't heard from Peter since he went on holiday.
Succes!