had been grooving

• 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 groove.
  groove

  noun

  a long, narrow cut or indentation in a surface, as the cut in a board to receive the tongue of another board tongue-and-groove joint, a furrow, or a natural indentation on an organism.

Related Words

• trench