imperfective russian

• ступа́ть

  to tread to step on step

  (imperfective only) to leave

• несоверше́нный

  incomplete

  imperfect / imperfective (verbs)

• расска́зываться

  to be told (imperfective only)

• служи́вший

  who was serving (past active imperfective participle of служи́ть)