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have been preoccupying

  • present perfect progressive
    of preoccupy.
    preoccupy
    verb (used with object)
    to absorb or engross to the exclusion of other things.

Example Sentences

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He observes a host of customs that his parents taught him years ago, and many of the obscure facts that preoccupy him have been preoccupying him for ages.

From New York Times Jan. 9, 2010