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HYPHENATION |
The Chicago Manual of Style contains a huge chart listing various sorts
of phrases that are or are not to be hyphenated. Consult such a
reference source for a thorough-going account of this matter, but you
may be able to get by with a few basic rules. An adverb/adjective
combination in which the adverb ends in “-LY” is never hyphenated: “His
necktie reflected his generally grotesque taste.” Other sorts of adverbs
are followed by a hyphen when combined with an adjective: “His
long-suffering wife finally snapped and fed it through the office
shredder.” The point here is that “long” modifies “suffering,” not
“wife.” When both words modify the same noun, they are not hyphenated.
A “light-green suitcase” is pale in color, but a “light green suitcase”
is not heavy. In the latter example “light” and “green” both modify
“suitcase,” so no hyphen is used.
Adjectives combined with nouns having an “-ED” suffix are hyphenated:
“Frank was a hot-headed cop.”
Hyphenate ages when they are adjective phrases involving a unit of
measurement: “Her ten-year-old car is beginning to give her trouble.” A
girl can be a “ten-year-old” (“child” is implied). But there are no
hyphens in such an adjectival phrase as “Her car is ten years old.” In
fact, hyphens are generally omitted when such phrases follow the noun
they modify except in phrases involving “all” or “self” such as
“all-knowing” or “self-confident.” Fractions are almost always
hyphenated when they are adjectives: “He is one-quarter Irish and
three-quarters Nigerian.” But when the numerator is already hyphenated,
the fraction itself is not, as in “ninety-nine and forty-four one
hundredths.” Fractions treated as nouns are not hyphenated: “He ate one
quarter of the turkey."
A phrase composed of a noun and a present participle (“-ing” word) must
be hyphenated: “The antenna had been climbed by thrill-seeking teenagers
who didn’t realize the top of it was electrified.”
These are the main cases in which people are prone to misuse hyphens. If
you can master them, you will have eliminated the vast majority of such
mistakes in your writing. Some styles call for space around dashes (a
practice of which I strongly disapprove), but it is never proper to
surround hyphens with spaces, though in the following sort of pattern
you may need to follow a hyphen with a space: “Stacy’s pre- and
post-haircut moods.”
