a pear(There is/ There are) on the desk.
There is a pear on the desk.
snakes( There is/ There are) in the zoo.
There are some snakes in the zoo.
three crocodiles(There is/ There are) in the zoo.
There are three crocodiles.
× burgers (There isn't/ There aren't) on the desk.
There aren't any burgers on the desk.
a desk(There is/ There are) in the classroom.
There is a desk in the classroom.
× rulers(There isn't/ There aren't) in the classroom.
There aren't any rulers in the classroom.
× bags(There isn't/ There aren't) in the classroom.
There aren't any bags in the classroom.
five monkeys( There is/ There are) in the zoo.
There are five monkeys in the zoo.
× eleven chairs(There isn't/ There aren't) in the classroom.
There aren't eleven chairs in the classroom.
hippos( There is/ There are) in the zoo.
four teachers(There is/ There are) in the classroom.
There are four teachers in the classroom.
two tigers(There is/ There are) in the zoo.
There are two tigers.
a chair(There is/ There are) in the classroom.
There is a chair in the classroom.
× a banana(There isn't/ There aren't) on the desk.
There isn't a banana on the desk.
elephants( There is/ There are) in the zoo.
There are some elephants in the zoo.
an apple(There is/ There are) on the desk.
There is an apple on the desk.