Hyphenated Adjectives | Get It Write Online
getitwriteonline.com › hyphenated-adjectivesMay 20, 2017 · Hyphens are unnecessary in sentence 1 because the phrase “five years of age” is not being used as a single adjective. In sentence 2, however, the phrase “five-year-old” is being used as a single descriptor for the noun “boy.” Not one of the words in that phrase would work alone; that is, he is not a “five boy,” a “year boy,” or an “old boy.”
Hyphen Usage—Rules and Examples - Grammarly
www.grammarly.com › blog › hyphenJan 14, 2021 · Hyphens with High or Low When using high or low as part of a compound adjective, use a hyphen when the compound comes before the noun it’s modifying. Some examples of compound adjectives using high and low include high-level/low-level and high-impact/low-impact Low-flying airplanes contribute to the noise pollution in the area.