參閱：used to 與 be used to 的用法差異
曾經英文造句練習Max used to be the lead singer of our band.
It used to be an open space, now a building.
The neighborhood was once very desolate, and now it is very prosperous.
Taiwan has had a moment of economic prosperity.
Our company used to launch a very special toy.
Miller once owned a Porsche 959.
Matt was once a fan of the Yankees.
Raby had dreamed of becoming a spaceman.
This restaurant was once the most popular in our town.
My father had participated in triathlon when he was young.