will have been tumbling

• 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 tumble.
  tumble

  verb (used without object)

  to fall helplessly down, end over end, as by losing one's footing, support, or equilibrium; plunge headlong.

Related Words

• descend
• dip
• drop
• flop
• go down
• nose-dive
• plummet
• plunge
• sag
• skid
• slip
• slump
• spill
• stumble
• topple