1.I didn't listen to Western music some years ago.
I didn't use to listen to Western music some years ago.
2.My mum was a chef in Cham restaurant, but now she is retired.
My mum used to be a chef in Cham restaurant, but now she is retired.
3.There was a market here in 2003.
There used to be a market here in 2003.
4.There are more cars on the roads now.
There used to be fewer cars on the roads.
5.She was my idol when I was a child.
She used to be my idol when I was a child.
6.They didn't know how to drive a car, but now they can drive well.
They didn't use to know how to drive a car, but now they can drive well.