|1) completed action in the past||I visited Amsterdam last week.
Jane lived in Canada in 2005.
|2) duration in past||I waited for twenty minutes.
The children sat at the beach all day.
|3) a series of actions in the past||She finished work and drove to the shop.
Adam came in, took off his coat and sat down.
|4) habits in the past||When I was a child, I visited my aunt every month.
He worked every day last month.
|1) interrupted actions in progress||While Sue was reading a book, the plane crashed.
I was cooking dinner when the bell rang.
|2) parallel actions||She was studying while I was talking.
Alan was sleeping and Jenna was watching TV.
|3) action going on at a certain time||From 5 to 6 I was listening to music.
Yesterday at six she was flying to London.
|4) repeated actions irritating the speaker
(always, constantly, continually)
|She was always criticising me.
They were constantly arguing about money.