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has been improvising

  • present perfect progressive
    of improvise (3rd person singular).
    improvise
    verb (used with object)
    to compose and perform or deliver without previous preparation; extemporize.

Example Sentences

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To pass the time, and to keep his young stepdaughter distracted, he tells her a story that he has been improvising at bedtime, which he calls “The Private Lives of Trees.”

From The New Yorker Jun. 15, 2015

Maxwell in Egypt has been improvising a few; Methuen at Malta says they can't make them there.

From Gallipoli Diary, Volume I by Sir Ian Hamilton