動(dòng)詞：use sth to do sth = use sth for doing sth 把某物用于做某事
be used to do sth = be used for doing sth 用于做某事
be/get used to doing sth 習(xí)慣于做某事
used to do sth 過去常常/曾經(jīng)做過某事
名詞：make use of 利用 = put sth to use
in use 在使用中
come into use 開始被使用