1. I haven`t eaten today yet. 2. He didn`t eat yesterday. 3. Did you play the piano yesterday? 4. Have you played the piano today? 5. What have you prepared for today? 6. ...Mike has made it himself. He made it last Sunday. 7. Where did you put my pen? ...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?