Вмоей комнате находится книжный шкаф-перевести на .яз и поставить в отрицательной и вопросительной форме: заранее ! )

There is a bookcase in my room.

Is there a bookcase in my room?

There isn't a bookcase in my room.

There is a bookcase in my room.
Is there a bookcase in my room?
There isn't a bookcase in my room.