Преобразуйте предложения в во и отрицательные.
1. They have heard the news.
2. I have already done my work.
3. We have already written our test paper.
4. She has just passed her exam.
5. We had finished the course paper by last Friday.
6. My brother had passed all his exams before her went to Moscow.
7. I had booked the ticket before I got the letter.
8. We will have finished the experiment by 5 o’clock tomorrow.
9. I will have translated the article before you come.
10. They will have passed all their exams by the end of the winter session.