Hyphenated Words: Usage, Rules, and Examples
prowritingaid.com › hyphenated-wordsMar 10, 2022 · If there is a number in a compound adjective, it must have a hyphen. However, if it’s not part of a compound adjective that precedes a noun, we do not hyphenate the word: I’m on vacation for two weeks. The boy is five years old. The castle was built in the fifteenth century. She teaches third grade. I came in second place.