◆be made of意思是“由……製成”,介詞of所指的原材料一般是未經變化,仍可看出材料的.例如： The desk is made of wood. This bridge is made of stone. 課桌是用木頭做的.橋是石頭造的.

◆be made from意思也是“由……製成”,但介詞from所指的原材料往往是經過變化,已看不出原材料的.例如： Paper is made from wood. The wine is made from rice. 紙是用木頭做的.酒是由稻穀製成的.

◆be made in意思是“由（什麼地方）生產的”,表示某一物品在某地生產或製成,in後面接表示地點的名詞.例如： This kind of bike is made in Japan. China is mostly made in China. 這種腳踏車是日本生產的.瓷器主要產生中國.

◆be made into 把……做成某產品（加工製成的成品） Plastics are easy to be made into different shapes. 塑膠易於加成各種不同的形狀.