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had been classifying

  • past perfect progressive
    of classify.
    classify
    verb (used with object)
    to arrange or organize by classes; order according to class.

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Hope, whose previous job had been classifying 147 ancient hedgerows in south Dorset, falls in love with John's billowing dreams: "What I want to do," he says, "is write the geometry of a wave."

From Time Magazine Archive