例句He was starting his day when he received a call from Rockville Street.

这是初二学的吧！过去进行时，好像讲的是飞碟来了，人们干的事情,对不？
仿写：
1.I was doing my homework while my mother was doing some housework.
2.We were playing football when he left.
注意过去进行时中,冠词（am/is/are）要用过去式，when后可以搭配过去时和过去进行时，while后面只能搭配过去进行时。
用在过去进行时的动词要用ing形式，必须是延续性动词，过去时要用瞬间动词（比如leave等）
o(∩_∩)o...

I was about to go out for dinner when the phone rang.
我刚要去外面吃晚饭电话就响了。
She was about to go to bed when suddenly someone knocked the door.
她刚要睡觉就有人敲门。

I was reading a comic when he called me.
He fell down when he was riding a bike.