выступавший

выступавший

"One who was speaking (performing, presenting, or addressing)."

The word 'выступавший' is used as a past participle to describe the professor who performed the action of speaking yesterday.

Выступавший вчера на конференции профессор поразил всех своей речью.

The professor who spoke yesterday at the conference amazed everyone with his speech.

Here, 'выступавшую' is the feminine singular form of the participle, matching the gender and case of 'певицу', indicating that the singer performed the action of speaking or singing.

Мы слушали выступавшую в этом хоре певицу.

We listened to the singer who sang in this choir.

In this sentence, 'выступавших' is the plural form of the participle, agreeing in number and case with 'музыкантов', referring to those who performed.

Журнал отметил выступавших на концерте музыкантов.

The magazine noted the musicians who had performed at the concert.