1. Jane hasn't been to America sincefor 1981.

2. I haven't met Jill sincefor the end of the school.

3. I haven't slept sincefor 48 hours.

4. i've read two books sincefor the weekend.

5. He hasn't played the piano sincefor he was a boy.

6. Jane has worked here sincefor two weeks already.

7. These cherry trees have bloomed every spring sincefor 1980.

8. They have been raising horses and cows on their farm sincefor many years.

9. They've been in love sincefor three weeks.

10. New ideas have been put into practice sincefor he was elected our leader.