the well-known actressBut:
The actress is well known.Hyphens in Compound Adjectives, General Rule
internationally recognized author (past participle) rapidly increasing revenues (present participle) newly free country (adjective)The above rule applies to ‑ly adverbs. But when you form a compound adjective with adverbs not ending in ‑ly, such as well or ill, the expression is hyphenated when it comes before the modified noun. If the compound adjective isfurther modified by an adverb, no hyphen appears. Study these two examples:
the well-known actress the very well known actress the ill-conceived planIf the expression comes after the modified noun, however, no hyphen appears.
The actress is well known.Though it’s difficult to classify all possible compound adjectives, you will find that many fall into one of various categories. These appear in the eBook Rules on Punctuation.
|Wall Street Journal Examples||Wall Street Journal Examples|
|11-year-old schoolboys||military-base conversion|
|American-style savagery||short-term interest rates|
|bone-numbing currents||so-called Brady bill|
|bungee-jump advocates||teeth-rattling fogs|
|cellular-phone services||Texas-based search firm|
|entry-level salaries||three-ring circus|
|executive-search firm||three-year profit streak|
|first-quarter profit||two-year-old boy|
|gun-control debate||U.S.-built artillery-targeting systems|
The day-trip trade also is flourishing. Experts say people are staying closer to home on weekends and holidays, taking advantage of new daylong hot-spring packages and by-the-hour room rentals.Notice that daylong in the above passage is not hyphenated for the simple reason that it has achieved “word” status, which you can determine by checking an unabridged dictionary.
base-closing test expense-paring efforts intelligence gathering methods (why no hyphen?)