1. Clemens has written fifteen books so far. Fifteen books by Clemens so far. 2. They have visited twelve countries. Twelve countries by them. 3. How long have you sung this song? How long this song ? 4. Maria hasn’t spoken this language before. This language by Maria before. 5. We have worn these clothes for three years. These clothes by us for three years. 6. The people haven’t understood the text yet. The text yet. 7. My dad has kept this wine since 1990. This wine by my dad since 1990. 8. Have they begun the exercises yet? the exercise yet? 9. They have forgotten about me already. I already. 10. My grandfather hasn’t told this story since I was a child. This story by my grandfather since I was a child.