Ответ:

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) Look at this birdhouse. Mike has made it himself. He made it last Sunday.

7) Where have you put my pen? I can’t 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 theater?

11) Look at my new dress. I have made it myself.

12) He is not at school today, he has fallen ill. - When did he fall ill? - He fell ill yesterday.

13) I have 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. Now she is doing her homework.

19) I read this book last year.

20) I have read this book this year.

21) I have never been to Washington.

22) Have you ever been to New York?

23) Have you ever seen the eruption of a volcano?

Объяснение: