填
be used for
be used for making=be used to make去掉can呢？wood used for making paper，被用来造纸的木材。（used for making paper过去分词作后置定语）wood used to make paper，同上。均可。不加is吗？你说去掉can···，理解出现了偏差把情态动词换成be动词，并不影响use的用法wood is used for making paper，木材被用来造纸。（此时是一个句子）wood is used to make paper，同上。放心哦……*^_^*谢谢采纳哈，#^_^#