perfective

"You must do your homework before you can watch television."

"The court returned a sentence of guilt in the first charge, but innocence in the second."

"Why do my relatives always talk about sex?"

"The imperfective describes the action of studying, emphasizing the ongoing process, not a completed event. "

"The system runs to perfection."

"Be sure to finish your homework before you go to bed!"

"You need to learn to be more tolerant of difference."

"Her diligent practicing on the piano led to a stunning performance at the recital. "

"The teacher patiently explained the math problem, and the students were able to understand the steps involved. "

"The guard blew his whistle to indicate imminent departure."

"He completed the assignment on time."

"the performance of an undertaking or a duty"