will have been ballooning

• 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 balloon.
  balloon

  noun

  a bag made of thin rubber or other light material, usually brightly colored, inflated with air or with some lighter-than-air gas and used as a children's plaything or as a decoration.

Related Words

• enlarge
• expand
• inflate
• swell