Напишите последующие предложения в вопросительной и отрицательной формах: 1. You are

1. You are doing that exercise correctly. - Are you doing that exercise correctly? - You are not doing that exercise correctly.
2. All the birds are flying south. - Are all the birds flying south? - All the birds are not flying south.
3. They are travelling in Europe at present. - Are they travelling in Europe at present? - They are not travelling in Europe at present.
4. Helen is taking dancing lessons at the country club. - Is Helen taking dancing lessons at the country club? - Helen is not taking dancing lessons at the country club.
5. Mr. Evans is writing a series of articles on the economic situation. - Is Mr. Evans writing a series of articles on the economic situation? - Mr. Evans is not writing a series of articles on the economic situation.
6. Ann is doing well in her studies at present. - Is Ann doing well in her studies at present.? - Ann is not doing well in her studies at present.