Heh dziwne...ale miałem podobne zadanie ostatnio :)
1. Have you ever heard of this?
2. She did not come because she is sick.
3. He had already left.
4. Does she finally wrote to John?
5. I know his parents for many years.
6. Students are here from 10 hours
7. Tom studied German since childhood.
8. We listened to the message.
9. She worked a lot recently.