Past Continuous Tense

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.

Examples:

• Last night at 6 PM, I was eating
  dinner.


• At midnight, we were still
  driving through the desert.


• Yesterday at this time, I was sitting
  at my desk at work.

Examples:

• I was studying while he
  was making dinner.


• While Ellen was reading, Tim
  was watching television.


• Were you listening
  while he was talking?


• I wasn't paying attention while I
  was writing the letter, so I made several
  mistakes.


• What were you doing
  while you were waiting?


• Thomas wasn't working, and I
  wasn't working either.


• They were eating dinner,
  discussing their plans, and having
  a good time.