Adjectives are words that describe things.
Point 1: Adjectives can go after a 'be' verbs.
I am tall.
She is nice.
My cat is cute.
Point 2: Adjectives can go before a noun.
I have a big house.
That is a nice bag.
He is a good teacher.
Point 3: You can put adjectives together.
He is smart and funny.
She is kind and friendly.
She is tall, strong, and fast.
The test was hard, long, and boring.