participating

"He is a student of life."

"My friend told me there was something in the box, but I didn't know what it was yet. "

"The divers encountered a huge school of mackerel."

"The teacher gave each student a share of the cookies. "

"Often used to imply membership of a large class."

"Teaching oneself to swim can be dangerous."

""At the hospital, Dr. Lee often shares her research with her colleagues." "

"The gardener carefully involved the long hose around the metal post. "

""She helped me with my homework, and I helped others with theirs." "

"My sister is always driving me crazy."

"My discussion with the professor was very enlightening."

"The transfer of the student to a different class was announced in a school memo. "