The detective was investigating the crime scene at ten this morning.
We watched a documentary on the pyramids and wrote a report about it.
Agatha Christie wrote about 80 detective stories in her lifetime.
James woke up at four o'clock every morning.
I was reading about the crop circles while my brother was watching a DVD.
While the policeman was collecting the evidence, a reporter arrrived to ask some questions.
Actions which happened one after the other in the past.
An action that was in progress in the past that was interrupted by another action.
Two or more actions that were in progress at the same time in the past.
An action that was in progress at a specific time in the past.
Past routine and habits.
An action or situation which started and finished in the past.