What is two-word adjectives?

"Two-word adjectives" is a bit of a misnomer. There's no official grammatical term for it, but what you're likely referring to are compound adjectives.

Compound adjectives are formed by combining two or more words to create a single descriptive term. They can be:

* Hyphenated: *well-behaved*, *high-quality*, *state-of-the-art*

* Solid (no hyphen): *worldwide*, *homesick*, *waterproof*

Important things to remember about compound adjectives:

* Hyphenation rules: Hyphens are generally used when the compound adjective precedes the noun it modifies. If the compound adjective follows the noun, hyphens are usually dropped.

* *She has a well-behaved dog.* (Before the noun)

* *The dog was well behaved.* (After the noun)

* Context matters: The meaning of a compound adjective can sometimes change depending on how it's used. For example, *long-term* can refer to something lasting a long time, but *long term* can refer to a plan or goal.

Let me know if you have any other questions!