use to 用...来做某事 He uses a knife to cut.
used to do 过去常常做某事 He used to live in London.
be used to do 被用作做某事 Knives are used to cut food.被动语态
be used to doing 习惯做某事 I'm not used to eating so much at lunch time
be used for 用来做某事；...的作用是 The knife is used for cutting.
.汗,UAE是阿拉伯联合酋长国的意思.楼主弄错了吧