Ответ:

1. The performance will already have started by the time we get to the theatre.

2. He will have been flying non-stop for seven hours before he gets to London.

3. By our estimate, 30,000 people will have bought this book by the end of the year.

4. We will have translated the article by 5 o’clock.

5. I’ll begin to work at 9 am. When you return home at 4 pm, I will have been working for seven hours already.

6. I am sure they will have completed their work by September.

7. By May, they will have been living in this house for ten years.

8. By next July, I will have finished my exams, and I will be ready for a holiday.

9. It is strange that when we get to New York, we will have flown halfway around the world.

10. I hope they will have built this bridge by the time we come back next autumn.

11. By 7 o’clock, the children will have been surfing the Internet for three hours.

12. By the end of the year, our teacher will have been teaching for 40 years.

13. I will have done all my homework by bedtime.

14. In a few minutes, Jim will have been waiting for Ann for an hour already.

15. Craig probably won’t have left by the time you get home.

16. At 6 o’clock, Cathy will have been doing her English homework for two hours.

17. By the end of the year, we will have been learning English for already eight years.

18. When we come home, Mother will probably have made her tasty pancakes.

19. By next month they will have collected 10,000 dollars for charity.