will have been spying

• future perfect progressive

  future perfect progressive

  Used to describe a continuous action that will progress up until a designated point of completion in the future.

  of spy.
  spy

  noun

  a person employed by a government to obtain secret information or intelligence about another, usually hostile, country, especially with reference to military or naval affairs.

Related Words

• agent
• detective
• informer
• investigator
• mole
• operative
• secret agent
• secret service
• undercover agent