Past progressive

Use the Past progressive to indicate that a longer action in the past was interrupted. The interruption is usually a shorter action in the Simple Past. Remember this can be a real interruption or just an interruption in time.

Examples:

• I was watching TV when she called.
• When the phone rang, she was writing a letter.
• While we were having the picnic, it started to rain.
• What were you doing when the earthquake started?
• I was listening to my iPod, so I didn't hear the fire alarm.
• You were not listening to me when I told you to turn the oven off.
• While John was sleeping last night, someone stole his car.
• Sammy was waiting for us when we got off the plane.
• While I was writing the email, the computer suddenly went off.
• A: What were you doing when you broke your leg?
  B: I was snowboarding.