8. Have you ever tried sushi?
9. How long have you been here?
10. Have you seen New York before?
11. Have you finished your project yet?
12. Andrew said he has already done about half of the project.
13. He is going to start working next week.
14. She has been sitting at her computer for seven hours.
15. She hasn't had any fun in a long time.
16. My father hasn't played any sport since last year.
17. I should have a shower. I haven't had one since Thursday.
18. I haven't seen my family for five years since I don't live with them anymore.
19. I just realized that there are only four weeks left until the end of term.
20. The train drivers are on strike and they stopped working at twelve o'clock.