Помогите пожалуйста. Поставьте следующие предложения в вопромительную и отрицательную формы. A new play is being staged at our theatre. The hall is usually separated from the stage. He had been introduced to me before I met you. Moscow University was founded in 1755. The doors are open

A new play isnt being staged at our theatre.Is a new play being staged at our theatre?The hall isnt usually separated from the stage.Is the hall usually separated from the stage?He hadnt been introduced to me before I met you.Had he been introduced to me before I met you ?Moscow University wasnt founded in 1755.Was Moscow University founded in 1755?The doors arent open.Are the doors open ?