Нужно сделать эти предложения во и отрицательной формы очень Кто разбирается.
1. Silvia has been studying English for two years. 2. It has been raining for an hour. 3. At the time the factory closed down, Sarah had been working there for five years. 4. Dave has been playing the piano since he was seven years old. 5. He has had a camera since 1995. 6. I had been walking along the road for about ten minutes when a car suddenly stopped just behind me. 7. Mary has been working in London since 18 January. 8. Anne has been looking for a job for six months. 9. Next year I will have been working for the company for 30 years. 10. We had been playing for half an hour when it started to rain.