a quantity of可以修饰不可数名词吗？

a quantity of可以修饰不可数名词吗？

quantities of和a quantity of都可以修饰可数名词和不可数名词，区别在于：　　quantities of在修饰不可数名词，并且和后面的名词一起做主语时，谓语由它决定，也就是用复数。　　a quantity of修饰不可数名词，并且和名词一起做主语时，谓语动词由后面的名词决定，也就是用单数。　　例如：Quantities of energy are saved today. (今天大量的能源被节约)　　 A quantities of energy are saved today.　　 Quantities of cash have been withdrawn from the bank.　　（大量的现金已经被从银行取出）　　Aquantity of ready-use 35 mm ammunition in clips is also carried. 　　一批准备使用35毫米弹药在剪辑，也获得通过。其他时候俩者可互换。　　The milk carton, in turn, has a quantity of milk inside it. 　　=The milk carton, in turn, has quantities‍ of milk inside it　　这盒牛奶，再进一步，它里面牛奶有一个量。