Hyphenated words
Rule #1 Hyphenate all compound numbers from twenty-one through ninety-nine. Examples: The teacher had thirty-two children in her classroom. Only twenty-one of the children were bilingual.
Rule # 2 Hyphenate all spelled-out fractions. Examples: You need one-third of a cup of sugar for that recipe. More than one-half of the student body voted for removing soda machines from campus
Rule # 3 Hyphenate all words beginning with self except for selfish and selfless. Examples: self-assured self-respect self-addressed
Here are some other examples: Vice-president School-poet Student-athlete Brother-in-law Great-granddaughter Self-restraint One-half President-elect
Use Hyphens to connect two or more words into a new adjective A one-way street Ice-covered trees Tree-lined streets Just-baked cookies Vanilla-flavored milk A once-in-a-lifetime event