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How are compound adjectives formed? Compound adjectives can be formed as follows: Adverb-past participle / noun + ed a well-known writer a brightly-lit room deeply-rooted traditions a well-mannered girl Adjective-present participle (verb + ing) a good-looking boy a free-standing tower Noun-past participle a tongue-tied boy a sun-dried fruit Adjective-past participle / noun + ed a short-sighted man a long-haired lady Noun- adjective a world-famous singer Adjective- noun a last minute solution deep-sea diving Noun-noun a part-time job