made of、made by、made from、 made in的区别及其用法。
答：be made of和be made from都表示“由??制成”，主语为制成品，但前者表示制成成品后，仍可看出原材料是什么，保留原材料的质和形状，制作过程仅发生物理变化；后者表示制成的东西完全失去了原材料的外形或特征，或原材料在制作过程中发生化学变化，在成品中已无法辨认。如：
The kite is made of paper．风筝是用纸做的。
The paper is made from paper．纸是木头做的。
Butter is made from milk．黄油是从牛奶中提炼出来的。
be made in表示某物在某地生产或制造，in后接表示地点的名词；be made by表示“由（谁）制造”，by后接动作的执行者。如：
This TV set is made in Shanghai．这台电视是上海制造的。
The machine is made by the workers in the factory．这机器是由工厂里的工人们制造的。
第二篇：be made of be made from be made in be made into be made up of的用法
be made of/be made from/be made in/be made into/be made up of
1. be made of表示"由…制成", 一般指能够看出原材料，或发生的是物理变化。 Chair is made of wood. 椅子是木头做的。
This tablecloth is made of paper. 这张桌布是由纸做的。
This salad is made of apples and strawberries. 这种沙拉是由苹果和草莓做的。
2. be made from也表示"由…制成"，但一般指看不出原材料，或发生的是化学变化。
Bread is made from corn. 面包是小麦做的。
The lifeboat is made from some special material. 这个救生艇是由某种特殊材料制成的。
3. be made in指的是产地，意思为"于…制造"。
The caps are made in Russia. 这些帽子产于俄罗斯。
My mother likes to buy things which are made in China. 我妈妈喜欢买中国产的东西。
4. be made into的意思为"被制成为…"。
This piece of wood will be made into a small bench. 这块木头将要被制成一个小凳。 The paper has been made into clothes for the doll. 纸被做成了洋娃娃的衣服。
5. be made up of由…构成、一般是多种构成。
Water was made up of oxygen and hydrogen. 水由氧气和氢构成