Поставьте эти предложения в отрицательную форму 1.there is a bookshelf by the window. 2. there are two girls in the room. 3. there is an armchair by the table. 4. there are two beds in the bedroom.

There is not a bookshelf by the window
there are not two girls in the room.
there is notan armchair by the table.
There are not two beds in the bedroom.