1.   After about half an hour, the shooting died down and some one helped me inside the Cathedral.

2.   After half an hour she had to admit defeat.

3.   Bring the soup to the boil and allow it to simmer gently for about half an hour.

4.   Can you meet me at the parking place outside the cathedral in half an hour?

5.   Dinner half an hour earlier or later was neither here nor there.

6.   Exactly half an hour later, my doorbell rang.

7.   Fifteen miles south of Garberville my eyes began to close and I pulled over and slept for half an hour.

8.   For half an hour, the great fan blows, and iron melts, gathering at the base of the furnace.

9.   George went out half an hour ago.