To modify or say characteristics of a noun, I can use:

AdjectivesCompound adjectives

I like colourful cats.

but I love big-headed cats.

how can I form compound adjectives?

Simple!

In general we put a hyphen between two or more words (before a noun) when we want them to act as a single idea (adjective) that describes something.

This is an english-speaking class.

Wait!

What’s an hyphen

We are describing the alligator. What type of alligator is it? It is one that eats men (or people).Without the hyphen sounds like a man is eating an alligator.

Some of this c.adjectives are form by:noun/adjective/adver present participle( ing )

Not only is he a good actor, but also a good-looking one.

He looks very good.

This scene is so scary that it makes your hair raise!This is a hair-raising scene.

Some of this c.adjectives are form by:

noun/adjective/adver past participle (v3)

It’s impolite to show up with your hands empty when you are invited to a party.

It’s impolite to show up empty-handed when you are invited to a party.

Don is a singer with long hair, brown eyes and big shoulders

Don is a long-haired, broad-shouldered singer, with brown eyes.