Singular (1)

a book.

a pencil.

a dictionary.

a pen.

a backpack.

an eraser.

a notebook.

a cell phone.

a piece of paper.

I have

I don't have

You have

You don't have

He has

He doesn't have

She has

She doesn't have

It has

It doesn't have

Plural (2,3...)

books.

pencils.

dictionaries.

pens.

backpacks.

erasers.

notebooks.

cell phones.

pieces of paper.

We have

We don'thave

You have

You don'thave

They have

They don'thave