There is a table in the house. There is a cat on the sofa. There are some flowers in the vase. There are some houses in this town.
There isnt a cat on the sofa. There isnt a palace in this city. There arent any flowers in the vase. There arent any cars in the street.
Is there a cat on the sofa? Is there a castle in the town? Are there any flowers in the vase? Are there any computes games on the table?