acted

"The student acted quickly and answered the question correctly. "

"She acted quickly to help her friend who fell. "

"I started acting at the age of eleven in my local theatre."

"The students acted out the scene from the play very well in class today. "

"A dog which acts aggressively is likely to bite."

"When she saw the spider, she acted surprised even though she already knew it was there. "

"act on behalf of John"

"Gravitational force acts on heavy bodies."

"The young girl acted the part of the fairy princess in the school play. "

"He acted the angry parent, but was secretly amused."

"The group of rotations acted on the set of vertices of a square, transforming each vertex to another. "

"The encouraging words from his coach acted to motivate the team to play harder. "