London used to be Britain's largest port.
伦敦过去是英国最大的港口城市。
India used to be a dependency of Britain.
印度过去是英国的.附属地。
He used to be able to cycle50 miles in a day, but he's past it now, I'm afraid.
他过去一天能骑50英里，不过现在恐怕不行了。
Jones used to be a thief, but now he's seen the error of his ways and is trying to rebuild his life.
琼斯过去是小偷, 但是现已知过能改重新做人.
There used to be public executions.
处决囚犯过去都是公开执行的。