看一个简单的例子：
Supper is ready!晚饭做好了!
以此类推,应当是
Have all the materials been ready?
Has all the material been ready?
顺便说一下,material作“物料”讲可以是复数名词,也可以是不可数名词,复数形式更为常见.
请高手把下面的句子用现在完成时被动语态写出来?
看一个简单的例子：
Supper is ready!晚饭做好了!
以此类推,应当是
Have all the materials been ready?
Has all the material been ready?
顺便说一下,material作“物料”讲可以是复数名词,也可以是不可数名词,复数形式更为常见.