has been lettering

• 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 letter (3rd person singular).
  letter

  noun

  a written or printed communication addressed to a person or organization and usually transmitted by mail.

Related Words

• answer
• memo
• memorandum
• message
• note
• postcard
• reply
• report