Измените следующие предложения в отрицательных и вопросительных формах.
1. Mobile phones have a negative effect on our life.
2. Our lives are much easier today.
3. Most people believe in better life in the future.
4. You came to my birthday party last year.
5. She saw two policemen running after a robber.
6. I ran into an old friend at the supermarket yesterday.
7. They visit their grandmother every Sunday afternoon.
8. I broke my brother’s new camera.
9. The play starts in ten minutes.
10. I’m cooking dinner this evening.