Singular (1)

a book.

a pencil.

a dictionary.

a pen.

a backpack.

an eraser.

a notebook.

a cell phone.

a piece of paper.

I don't have

You don't have

He doesn't have

She doesn't have

It doesn't have

Plural (2,3...)

books.

pencils.

dictionaries.

pens.

backpacks.

erasers.

notebooks.

cell phones.

pieces of paper.

We don't have

You don't have

They don't have