不可数名词必须用量词?

问题描述:

不可数名词必须用量词?
比如:a loaf of bread.难道不能说 do you want a bread?do you want some bread?
a lice of meat,i glass of milk,a cup of tea.
an important information / an important piece of information

some 可以修饰不可数名词
Do you want some bread/tea?是可以的 a bread 是错的
不可以用a,one two等基数词直接修饰不可数名词,中间要跟相应的量词
同样 an important information 也是错的 要说 an important piece of information