has been attesting

• 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 attest (3rd person singular).
  attest

  verb (used with object)

  to bear witness to; certify; declare to be correct, true, or genuine; declare the truth of, in words or writing, especially to affirm in an official capacity.

Related Words

• authenticate
• corroborate
• demonstrate
• indicate
• substantiate
• swear
• verify