a quantity of和quantities of的区别,amounts of和an amount of的区别

quantities of在修饰不可数名词,并且和后面的名词一起做主语时，谓语动词形式由它决

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，谓语动词形式由后面的名词决定，也就是用单数。

例如：Large quantities of money have been collected for the earthquake-hit area.

A large quantity of money has been collected for the earthquake-hit area.

人们已经为地震灾区筹集了大量的资金。