同学你好，该知识点来自沪江网校《英语零基础直达大学六级【随到随学班】》的课程，想要更系统的学习，欢迎进入课程学习。不仅可以和更多的同学一起学习，而且还有老师、助教随时的学习指导和知识点解答哦。

同学你好~
1 T： What were you doing when he arrived?
I was having a bath.
S： I was having a bath when he arrived.
2 T： What was Mary doing when the telephone rang?
She was washing the dishes.
S： She was washing the dishes when the telephone rang.
3 T： What was your mother doing when the postman came?
She was making the beds.
S： She was making the beds when the postman came.
4 T： What were you doing when it happened?
I was telephoning my sister.
S： I was telephoning my sister when it happened.
5 T： What were the children doing when the milk boiled over?
They were reading
S： They were reading when the milk boiled over.
6 T： What were you doing when the baby broke that cup?  这里要注意录音的内容
I was making tea.
S： I was making tea when the baby broke that cup.
7 T： What were you doing when your mother came into the room?
I was listening to the stereo.
S： I was listening to the stereo when my mother came into the room.
8 T： What was your father doing when he heard the news?
He was working in the garden.
S： He was working in the garden when he heard the news.
9 T： What was your sister doing when George knocked at the door?
She was cleaning her shoes.
S： She was cleaning her shoes when George knocked at the door.
10 T： What was your son doing when his friends arrived?
He was doing his homework.
S： He was doing his homework when his friends arrived.

祝同学学习进步~