Present, Past, Future Simple; Present, Past Continuous; Present, Past Perfect.
1. We go) to school every day.
2. Nick had done his home-work by seven o'clock yesterday.
3. Will you help) your father tomorrow?
4. We have brought a lot of berries from the wood. Now we shall make jam.
5. Look! Jane is swimming across the river.
6. What were you doing at six o'clock yesterday?
7. Have you ever seen the Pyramids?
8. I went to the Caucasus two years ago.
9. When Nick came home yesterday, his mother had returned and was cooking dinner in the kitchen.
10. When I was going to school yesterday, I suddenly remembered that I had forgotten to take my English exercise-book.
11. Yesterday grandfather told us how he was working at the factory during the war.
12. I always come to school at a quarter to nine.
13. Yesterday I came to school at ten minutes to nine.
14. Tomorrow Nick will not go to the cinema because he went to the cinema yesterday.
15. He has already been to the cinema this week. Look! He is crying.
16. What is your brother doing now?
17. When will you come to see me? — I will come tomorrow.
18. I do not like apples. And do you like them?
19. He came home in the evening yesterday.
20. I will ring you as soon as I can.
21. I will show my pets if you like.
22. Now he is trying to help his father in the garden.
23. I will send you a telegram tomorrow.
24. When I came home yesterday, my brother was sleeping.
25. Are you visiting the United States of America next year?