To describe a noun

She has [extremely evil] eyes.

Adj phrase = extremely evil
adj = evil
Noun = eyes

She has [very expensive] shoes.
She has extremely expensive shoes.

Adjective phrase = very expensive
adj = expensive
Noun = shoes

Using linking verb

Am/is/are/look/become/smell/taste/feel/sound

The flowers in the vase are vibrant and colorful.

Linking Verb: are
Subject: The flowers in the vase
Adjective Phrase (Subject Complement): vibrant and colorful
The cake she baked smells absolutely delicious.

Linking Verb: smells
Subject: The cake she baked
Adjective Phrase (Subject Complement): absolutely delicious
He seems happy with the results.

Linking Verb: seems
Subject: He
Adjective Phrase (Subject Complement): happy with the results
The weather today feels unusually cold for this time of year.

Linking Verb: feels
Subject: The weather today
Adjective Phrase (Subject Complement): unusually cold for this time of year
The view from the mountaintop was simply breathtaking.

Linking Verb: was
Subject: The view from the mountaintop
Adjective Phrase (Subject Complement): simply breathtaking

Comparative Adjectives

We experienced the decade’s [stronger] storms.

superlative adjective

They saw only the [brightest] stars.

Adjective Phrases that contains adverbs

It was a move.
It was a sensational move.
It was a [spectacularly] sensational move.

His hair surprised his parents.
His hair, [shockingly pink], surprised his parents.

Adjective Phrases can incorporate prepositions

ref – https://www.examples.com/english/adjective/adjective-prepositional-phrase.html

Begins with a preposition and functions as an adjective.

My uncle dated the girl with the tattoos.
(The phrase “with the tattoos” is a multi-word adjective describing “The girl,”
but it’s not headed by an adjective.

Headed by the preposition “with,” this is a prepositional phrase. It is best classified as an “adjectival prepositional phrase” as opposed to an “adjective phrase.”)

My grandmother makes the best food.
My grandmother [from Hangzhou] makes the best food.

My dog ate everything.
My dog, [like a pig], ate everything.

That man asked to see you.
That man [in the hat] asked to see you. (adjective phrase in the hat modifies man)

You can admit anyone.
You can admit anyone [with a ticket]. (with a ticket modifies anyone)

The schedule is posted on the board.
The schedule [for next week] is posted on the board. (for next week modifies schedule)

He is angry.
He is angry [about his pay decrease]. (about his pay decrease modifies he)

The design is similar to my bathroom wallpaper.
The design [on your shirt] is similar to my bathroom wallpaper. (on your shirt modifies design)

Taylor wants to stop at the restaurant.
Taylor wants to stop at the restaurant [by the mall]. (by the mall modifies restaurant)