had been superimposing

• past perfect progressive

  past perfect progressive

  Used to describe an action that was ongoing continuously in the past up until another past event interrupted it.

  of superimpose.
  superimpose

  verb (used with object)

  to impose, place, or set over, above, or on something else.

Popular Searches

• GOAT
• amateur
• force of nature
• upstander
• nonplussed
• piece of cake
• mnemonic