There are/There aren't 2 girls.
There aren't
There is/There are 2 birds.
There are
There is/There are a duck.
There is
There are/There aren't 3 trees.
There aren't
There is/There are a picnic blanket.
There is
There is/There are a tree.
There is
There are/There aren't 4 birds.
There aren't
There is/There are 2 boys.
There are
There is/There isn't a banana.
There is
There is/There isn't any dog.
There isn't
There are/There aren't any mountains.
There aren't
There are/There aren't 2 picnic blankets.
There aren't
There is/There are a flower.
There is
There is/There are a sandwich.
There is