1.习惯于某事/做某事 be used to sth/doing sth 被用来做某事 过去常常做某事 使用某物做某事 2. 把A用作B be used to do sth, be used for doing sth used to do sth use sth to do sth use A as B A被用作B A be used as B 3. 由…制成(看得出原材料) be made of 由…制成(看不出原材料) be made from 被制成… be made into 在某地制造be made in 由…制成(不强调是否看得出原材料)