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had been perceiving

  • past perfect progressive
    of perceive.
    perceive
    verb (used with object)
    to become aware of, know, or identify by means of the senses.

Example Sentences

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In August, 2010, Renetta e-mailed Rexroad to say that Christopher had been perceiving invisible dangers: when Stephen told him to do a household chore, Christopher reacted as if he’d been threatened.

From The New Yorker Jan. 26, 2015