has been winterizing

• present perfect progressive

  present perfect progressive

  Used to describe an action that began in the past, has continued continuously, and is still in progress.

  of winterize (3rd person singular).
  winterize

  verb (used with object)

  to prepare (an automobile, house, etc.) for cold weather by (in automobiles) adding antifreeze and changing oil or (in houses) adding insulation, heating units, etc.

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