過去進行時的構成和用法:
過去進行時的構成:was/were+動詞ing形式
1.表示過去某個時刻正在進行的動作,常與at seven yesterday morning,from 8:00 to 10:00等表示過去的時間狀語短語或when,while等引導的時間狀語從句連用;
Kitty was playing with her friends this time yesterday.
While my parents were working on the computer,I was sleeping.
When I saw her,she was flying the kite.
2.表示過去某段時間正在進行的動作;
He was reading the story during those days.
They were building the bridge last year.