has been parallelling

• 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 parallel (3rd person singular).
  parallel

  adjective

  extending in the same direction, equidistant at all points, and never converging or diverging.

Related Words

• analogy
• comparison
• corollary
• resemblance
• similarity