Напишите следующие предложения в вопросительной и отрицательной формах: 1. you are doing that exercise correctly. 3. all the birds are flying south. 6. they are travelling in europe at present.29 7. helen is taking dancing lessons at the country club. 8. mr. evans is writing a series of articles on the economic situation. 9. ann is doing well in her studies at present

1. Are you doing that exercise correctly? You ain't (are not или aren't) doing that exercise correctly.
2. Are all the birds flying south? All the birds ain't flying south.
3. Are they travelling in Europe at present? They are not travelling in Europe at present.
4. Is Helen is taking dancing lessons...? Helen is not (или isn't) taking lessons...
5. Is Mr. Evans writing a series...? Mr. Evans isn't writing a series... 
6. Is Ann doing well in her...? Ann isn't doing well in her...