was加动词是什么时态

　　例句：

　　He was repairing his bike.

　　他在修理自行车。

　　He was cleaning his car while I was cooking.

　　他擦车时，我正在做饭。

　　Tom was getting up at six o’clock every day that week.

　　汤姆那一周里每天都是六点钟起床。

　　While we were talking, the teacher came in.

　　当我们正在谈话时,老师进来了。

　　We were having supper when the phone rang.

　　我们正在吃晚饭时，电话响了