Where is the box?
It's on the desk.
Where is the box?
It's under the table.
Is the box under the desk?
No,it isn't.
It's on the floor.
Where is the box?
It's behind the chair.
Where are the cups?
They're on the desk.
Where are you,May?
I'm near the desk.
What's in the box?
Sorry,I don't know.
on/in/near/behind/under
The ball is on the box.
The ball is in the box.
The ball is near the box.
The ball is behind the box.
The books are under the box.
on/in/near/behind/under
bag/ruler/pencil/pen/eraser/box/pencil-box/schoolbag/desk/chair
Clock/egg/coat/cat/blackboard/classroom
a or an
a clock/a coat/a ruler/a flower/a desk/a chair/an egg/an eraser
a small egg/a new eraser/an old coat/an old clock
the (this/that)
a clock/the clock
a ruler/the ruler
a desk/the desk
an egg/the egg
a blackboad/the blackboad
a classroom/the classroom
the (these/those)
some clocks/the clocks
some rulers/the rulers
some desks/the desks
ten eggs/the eggs
twelve books/the books
eleven boys/the boys