be made of
be made from
都是“由什么做成”的
区别如下：
be made of 是可以看出原材料的,
例:The sweater was made of woollen.
毛衣是羊毛作的(可以看出的)
be made from是不可以看出原材料的,
例/:The paper is made from wood
纸是树木作的(看不出来的)
What is it made of?是提问看得出原材料的，如衣服clothes。
What is it made from?是提问看不出原材料的，如酒wine
to make sth from sth用某物制造某物 to make sth out of sth 用某物做成某物
It is made by+材料
What is it made of?
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