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The adverbs "slow" and "slowly"

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The adverbs "slow" and "slowly"
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Can the adverbs slow and slowly be used interchangeably? Editor Emily Brewster answers William's question:

The adverbs slow and slowly are actually not used in exactly the same way. A usage note at the entry for the adverb slow in Merriam-Webster's Collegiate Dictionary explains:

Slow is almost always used with verbs that denote movement or action, and it regularly follows the verb it modifies  <beans . . . are best cooked long and slow —Louise Prothro>. Slowly is used before the verb <a sense of outrage, which slowly changed to shame —Paul Horgan> and with participial adjectives <a slowly dawning awareness . . . of the problem —American Labor>. Slowly is used after verbs where slow might also be used <burn slow or slowly> and after verbs where slow would be unidiomatic <the leadership turned slowly toward bombing as a means of striking back —David Halberstam>.

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