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.

1. Mobile phones don't have a negative effect on our life. Do mobile phones have a negative effect on our life?
2. Our lives aren't much easier today. Are our lives much easier today?
3. Most people don't believe in better life in the future. Do most people believe in better life in the future?
4. You didn't come to my birthday party last year. Did you come to my birthday party last year?
5. She didn't see two policemen running after a robber. Did she see two policemen running after a robber?
6. I didn't run into an old friend at the supermarket yesterday. Did you run into an old friend at the supermarket yesterday?
7. They don't visit their grandmother every Sunday afternoon. Do they visit their grandmother every Sunday afternoon?
8. I didn't break my brother’s new camera. Did you break your brother’s new camera?
9. The play doesn't start in ten minutes. Does the play start in ten minutes?
10. I’m not cooking dinner this evening. Am I cooking dinner this evening?