مسئول

In a sentence

• او مسئول گروه کاری است.

  He is responsible for the work group.

  Here, 'مسئول' functions as a noun meaning 'responsible person' or 'leader' of a group.

• من خود را مسئول این اشتباه می‌دانم.

  I consider myself responsible for this mistake.

  In this sentence, 'مسئول' is used as an adjective describing a state of responsibility.

• مسئول بودن نیاز به تعهد دارد.

  Being responsible requires commitment.

  Here, 'مسئول' is part of a state or condition, referring to the quality of being responsible.