1.[曾经是]sb used to do sth.某人曾经做某事例句:My father used to smoke. I used to live in South America when I was a little boy. 2.[被用来]sth is used to do sth某物被用来做某事注意:这个短语是被动的。被动语态的结构是be+过去分词,后面的不定式to表 目的“用来做某事”。例句:The old pants is used to clean the table now 旧牛仔裤现在被用来擦桌子。3.[用作]use for 例句:We used the seal's fur for coats. 我们用海豹皮做大衣。4.[用光]use up 例句: By this time he had used up all his savings. 到这时, 他的存款已全部用完。 5 [习惯做某事]be used to sth./doing sth.例句: I'm used to taking a walk after supper. 我习惯餐后散步。就这些吧,我好像只能想起来这么多。