What is a determiner?

Determiners tell us which thing.

The determiners are:

This box
That box
These boxes
Those boxes
Which box
Whichever box
Whoever

Determiners Don’t Change

Pronouns change when they are subject or object. Determiners don’t.

This class is boring.
I hate this class.

That monkey is ugly.
I don’t like that monkey.

Examples using determiners

This pizza is terrible.
Those people are stupid.
These computers are cheap.

I don’t want this cat. I want that cat.
She hates those shoes.
They like whoever gives them money.