I moved in on the heavy bag and worked combinations for five minutes.

We worked at it for almost 25 minutes today.

"Putting the poor in balloons works for about eight minutes," I said.

They worked on her for 20 minutes, to no avail.

They worked for 90 minutes trying to win the match.

He worked for fifteen minutes before the first trickle came.

Doctors worked for 40 minutes before his heart began beating again.

They worked in silence for five minutes, before Samantha spoke again.

He worked for fifteen minutes, almost to the point of exhaustion.

Imagine that your team has worked very hard for 89 minutes to score a winning goal.