has been proofing

• 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 proof (3rd person singular).
  proof

  noun

  evidence sufficient to establish a thing as true, or to produce belief in its truth.

Related Words

• argument
• clue
• confirmation
• criterion
• data
• demonstration
• information
• picture
• reason
• testament
• testimony
• validation
• verification