will have been collapsing

• 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 collapse.
  collapse

  verb (used without object)

  to fall or cave in; crumble suddenly.

Related Words

• break
• cave in
• crumple
• disintegrate
• drop
• fail
• faint
• fall down
• founder
• give way
• shatter
• topple
• weaken