Use there is and chest of drawers.
There is a chest of drawers under the lamp.
Where is the girl?
She is in the box.
Where is a lamp?
There is a lamp next to the clock.
Use chair and in front of.
There is a chair in front of the bookshelf.
Use there are and clocks.
There are 2 clocks on the wall.
Where is the wardrobe?
There is a wardrobe between the clock and the mirror.
Use behind and the lamp.
There is a wardrobe behind the lamp.
Use 2 balls.
There are 2 balls under the bed.