has been grouping

• present perfect progressive

  present perfect progressive

  Used to describe an action that began in the past, has continued continuously, and is still in progress.

  of group (3rd person singular).
  group

  noun

  any collection or assemblage of persons or things; cluster; aggregation.

Related Words

• association
• band
• body
• class
• club
• company
• crowd
• faction
• gang
• organization
• party
• society
• troop