London used to be Britain's largest port.

　　倫敦過(guò)去是英國最大的港口城市。

　　India used to be a dependency of Britain.

　　印度過(guò)去是英國的附屬地。

　　He used to be able to cycle50 miles in a day, but he's past it now, I'm afraid.

　　他過(guò)去一天能騎50英里，不過(guò)現在恐怕不行了。

　　Jones used to be a thief, but now he's seen the error of his ways and is trying to rebuild his life.

　　瓊斯過(guò)去是小偷, 但是現已知過(guò)能改重新做人.

　　There used to be public executions.

　　處決囚犯過(guò)去都是公開(kāi)執行的。