1. I haven't eaten today.
2. He didn't eat yesterday.
3. Did you play piano yesterday?
4. Have you played piano today?
5. What have you prepared for today?
6. Look at this birdhouse. Mike has made it himself. He nade it last Sunday.
7. Where have you put my pen? I cannot find it.
8. Have you seen Mary today?
9. When did you see Mary? - I saw her last week.
10. Has your mother promised to take you to the theatre?
11. Look at my new dress! I've made it myself.
12. He is not at school today, he's fallen ill. - When did he fall ill? - He fell ill yesterday.
13. I've already done my homework. Now I can go for a walk.
14. I did my homework yesterday.
15. He has just come home.
16. He came home a minute ago.
17. Nick played football yesterday.
18. She has already come from school.
19. I read this book last year.
20. I've read this book this year.
21. I've never been to Washington.
22. Have you ever been to New York?
23. Have you ever seen the eruption of a volcano?
24. I've invited Linda to the party.