Поставьте предложения в вопросительную и отрицательную форму
He is an operator
They are locomotive drivers
You are a mechanic

Вопросительная форма: is he an operator, are they locomotive drivers, are you a mechanic отрицательно не знаю

Is he an operator
He isnt an operator.

Are they locomotive drivers
They arent locomotive drivers.

Are you a mechanic
They arent a mechanic.