be made of意思是“由……制成”,制成的成品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。如:
These chairs are made of wood.
这些椅子是木头做的。
The ring was made of silver.
这枚戒指是由银制成的。
be made from意思是“由……制成”,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:
Bread is made from wheat.
面包是小麦做的。
Paper is made from wood.
纸是由木头制成的。
be made into意思是“被制成……”,后接具体的事物,主语是材料。如:
This piece of wood will be made into a small bench.
这块木头将要被制成一个小长凳。
The cloth is made into a jacket.
这块布被制成了一件夹克。
be made by意思是“被……制成”,后面通常接人,用来指出动作的执行者。如:
This postcard was made by my sister.
这张卡片是我妹妹做的。
The book is being written by Tom.
这本书由汤姆正在写。
be made in意思是“在某地制造”,后面接地点。如:
This car is made in Shanghai.
这辆车在上海制造。
My mother likes to buy things which are made in China.
我妈妈喜欢买中国产的东西。