A third-debate moderator is not the same as a third debate moderator.
- Use a hyphen between two words that work together to describe a noun, when the compound adjective comes directly before the noun. Maria shared her blue-ribbon recipe.
- Don't use a hyphen when the two words come after the noun. Marie shared the recipe that won a blue ribbon.
- Don't use a hyphen when the first word in a compound modifier is an adverb that ends in '-ly.' Sam bought the highly recommended book.