Поставьте предложения в вопросительную и отрицательную форму. 1)Kate is a home. 2)My grandfather was a doctor. 3)He will be 17 in a month.
Is Kate at home? Kate isn't at home.
Was your grandfather a doctor? My grandfather wasn't a doctor.
Will he be 17 in a month? He won't be 17 in a month.