第1个回答 推荐于2016-01-17
1、be made of“由…构成”,能看出原材料,像桌子由木头制成,刀子由铁或金属制成,很明显看出原材料,如:
①The desk is made of wood.
②The knife is made of metal.
2、be made from“由…构成、制成成品”,被制成的东西看不出原材料,像纸是由木头制成的,这就看不出。
如:The paper is made from the wood.
3、be used for doing 用来做…
如:The knife is used for cutting things.
The pen is used for writing.
4、be used as 用来作…
The house is used as my bedroom.这个房子用作我的卧室。本回答被提问者和网友采纳