• There is not a horse in the field.
• There are not eight children in the school.
• There is not a tree in the garden.
• There are not two elephants in the zoo.

When we want to indicate that a zero quantity of something exists we use there aren't any.

• There aren't any people at the party.
• There aren't any trees in my street.

We also use this structure with uncountable nouns:

• There isn't any water in the swimming pool.
• There isn't any sugar in my coffee.

• There is not a horse in the field.
• There are not eight children in the school.
• There is not a tree in the garden.
• There are not two elephants in the zoo.
• There is one table in the classroom.
• There are three chairs in the classroom.
• There is a spider in the bath.
• There are many people at the bus stop.

1. There are books in the shelves.

2. There is a pair of sandals below the desk.

3. There is a picture of landscape on the wall.

4. There is a CPU in front of the sandals.

5. There is a man/boy displayed in the computer.

6. There are 2 cups, one is beside the shelf and the other one is inside the shelf.

7. There are pencils inside the pencil case/pencil box.

8. There is a pencil box on the shelf.

9. There are 6 books beside the computer monitor.

10. There is a clock on the wall.

11. There are books on the bookshelf.

12. There is a desk next to the bookshelf.

13. There aren’t two posters on the wall.

14. There is a laptop and a lamp on the desk.

15. There aren’t 3 small trees in the corner.
16.There are many opportunities to learn at this company.
17.There is a wide variety of flavors to choose from.
18. There are a variety of unique destinations we can visit. 
19. There are a lot of people in this elevator.
20.There is a kitchen, a living room, and a bedroom in my apartment.