Поставьте следующие предложения в вопросительную и отрицательную форму: doctor sandford is still in the hospital. my friend plays the piano very well. old mrs sandford is ill.

1) Doctor Sandford isn't still in the hospital.
Is Doctor Sandford still in the hospital?
2) My friend doesn't play the piano very well.
Does my friend play the piano very well?
3) Old Mrs Sandford isn't ill.
Is old Mrs Sandford ill?