use ...for sth 和use...to do sth有什么不同么?

use sth to do sth =use sth for doing use ...for sth 和use...to do sth有什么不同么? use sth to do sth和use sth for dong sth有什么区别最好举个例子 use sth to do sth相当于use sth for doing sth但use sth for sth这个短语是不是和上面的了可以互换.比如：People can use the tusks for piano keys and other beautiful things. use to do和use doing 和use for doing sth有什么区别以及中文解释 是use sth for doing sth还是use sth doing sth be used to do sth,be use to doing sth,be use to sth,be use for sth区别 use...to和use...for的用法 use sth doing sth还是use sth to do sth use sth to the use of sth... use sth to sth 造句 use to do sth和use doing sth怎么区分啊 make use of sth.和keep use of sth.各有什么用法? tjere is no use to do/for sth no use for 和no use to 的用法. use to和use for用法相同吗?可不可以说use for doing=use to do use for ,use to ,use as use for ,use to ,use as