be made from, be made of ,be made by ,be made in的用法 语法和例句
be made from 用什么制成，看不见原材料。be made of 也是用什么制成， 能看见原材料。 be made by 有某人制成 be made in 在什么地方制成或生产。比如：the table is made of wood.桌子由木头制成。（看见材料）. the paper is made from bamboo. (看不见竹子）。the table is made by my granfather. 祖父做的。 the china vase is made in China. 瓷器花瓶是中国生产。
