1. The Past Progressive Tense is used as a background for a
shorter action to take place.
-I was reading the newspaper when the telephone rang .
-We were watching television when the door bell rang.
-Argentina was playing when my brother arrived.
While : simultaneous past actions in progress
While I was cooking, my brother was watching the match
While we were working , the teacher was talking to the
headmistress.
AS
I saw Peter as I was getting off the bus