(a) Adverb-plus-participle compounds are among the most troublesome. Do not hyphenate those in which the adverb ends in ly:
In other cases, hyphenate before the noun:
Do not hyphenate when the compound follows the noun or pronoun and contains a past participle:
When the compound follows the noun or pronoun and contains a present participle, do not hyphenate if the participle has a verbal function, but hyphenate if it is adjectival in nature:
but
(b) Do not hyphenate compounds consisting of an adverb or adverbial phrase plus an adjective (in that order) unless there is a danger of misreading:
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