Помогите пожалуйста, нечего непонял по теме

Раскройтескобки, употребляяглаголыв Present Perfect или Past Simple.

1. I (not yet to eat) today. 2. He (not to eat) yes­terday. 3. You (to play) the piano yesterday? 4. You (to play) the piano today? 5. What you (to prepare) for today? 6. Look at this birdhouse. Mike (to make) it himself. He (to make) it last Sunday. 7. Where you (to put) my pen? I cannot find it. 8. You (to see) Mary today? 9. When you (to see) Mary? — I (to see) her last week. 10. Your mother (to promise) to take you to the theatre? 11. Look at my new dress! I (to make) it myself. 12. He is not at school today, he (to fall) ill. — When he (to fall) ill? — He (to fall) ill yesterday. 13. I already (to do) my homework. Now I can go for a walk. 14. I (to do) my homework yesterday. 15. He just (to come) home. 16. He (to come) home a minute ago. 17. Nick (to play) foot­ball yesterday. 18. She already (to come) from school. Now she is doing her homework. 19. I (to read) this book last year. 20. I (to read) this book this year. 21. I never (to be) to Washington. 22. You ever (to be) to New York? 23. You ever (to see) the eruption of a volcano? 24. I (to invite) Linda to the party. — When you (to see) her? — I (not to see) her for ages. I (to call) her an hour ago.

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Ответы и объяснения

2013-03-27T07:07:12+04:00

1. I have not eaten today yet. 2. He did not eat yesterday. 3. Did you played the piano yesterday? 
4. Do you play the piano today? 5. What do you prepare for today? 6. Look at this birdhouse. Mike made it himself. He made it last Sunday. 7. Where did you put my pen? I can not find it. 8. Do you see Mary today? 9. When did you saw Mary? - I saw her last week. 10. Does your mother promise to take you to the theatre? 11. Look at my new dress! I made it myself. Вот, пока что, что решила:)