Hej!
1. I've already finished my food.
2. You had lunch already? Would you like a sandwich?
3. My parents have never been to the US.
4. Tom just had his maths class.
5. Jack has already called. I've spoken to him.
6. I've never tried chewing gum.
7. They haven't arrived yet.
8. I've never had a mint yoghurt. I'd like to try it.
9. When have you been to the US?
10. My mum hasn't finished her project yet.
11. Have you done your homework yet?
12. She's just received a message from her friend.
Pozdrawiam - Antek!