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.麥克斯曾經是我們樂團的主唱。
It used to be an open space, now a building.
這裡曾經是一片空地，現在變成一個棟大樓。
The neighborhood was once very desolate, and now it is very prosperous.
這附近曾經非常荒涼，現在則變得非常繁榮。
Taiwan has had a moment of economic prosperity.
台灣曾經有過經濟繁榮的時刻。
Our company used to launch a very special toy.
我們公司曾經推出過一個很特別的玩具。
Miller once owned a Porsche 959.
米勒曾經擁有一輛保時捷 959。
Matt was once a fan of the Yankees.
麥特曾經是洋基隊的球迷。
Raby had dreamed of becoming a spaceman.
賴比曾經夢想過要成為一名太空人。
This restaurant was once the most popular in our town.
這家餐廳曾經是我們鎮上最受歡迎的。
My father had participated in triathlon when he was young.
我的爸爸年輕的時候曾經參加過鐵人三項。