there is / there are


1.  there are glasses on the computer
2. there is a fish swim in the computer
3. there are pencils on the blue desk
4 there is a paper sheet  behind the chair
5 there is a  book  next to computer keyboard
6 there are some papers on the floor
7 there is a cell phone in the middle the computer and flower pot
8 there are desks in the  office
9 there is red machine on the yellow desk in the office
10 there is a curtain  behind the computer 


prepositions 

abajo= below
debajo=under
encima = over
sobre=above
encima de =on 
cerca=near
detras de=behind
en  ( dentro)= in
encima de, en la parte mas alta=on top of
delante de =in front of
al lado de=next to 
 a traves de=across
en medio de = in the middle
lugar  especifico= at
lugar no especifico=in
cerca de= near