Ответ:

1. Bill runs in the park every day.

2. I am drinking a cup of coffee now.

3. Mary has just broken her leg.

4. They have been building this house since last year.

5. John bought this cake yesterday.

6. What were you doing at 6 o`clock yesterday?

7.  If she had not driven so fast, she would not have crashed her car.

8. The cats have been fighting for 2 hours.

9. Den will find a better book for you/

10. She will be forbidding it to you at 5 o`clock tomorrow.

11. Jane will have forgotten your words by the time you get there.

12. Your parents will have been keeping your things for three years.

Объяснение: