had been imprisoning

• 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 imprison.
  imprison

  verb (used with object)

  to confine in or as if in a prison.

Related Words

• apprehend
• commit
• detain
• hold
• incarcerate
• jail
• lock up
• remand