amount用作名词其意为“数量”、“金额”“总额”等，通常用于an amount of，a(great，large)amount of，amounts of这类结构，其后通常接不可数名词。

a large numberof和a large amount of的区别

①所能修饰的名词有区别

a large number of只可以修饰可数名词复数形式；a large amount of修饰不可数名词。

例句：I have a number of letters to write today.

今天我有好多信要写。

I spent a large amount of my time on this work.

我在这项工作上花了不少时间。

②谓语动词的形式有区别

a large number of 修饰的词作主语时谓语用复数形式；a large amount of 修饰的词作主语时谓语用单数形式。

例句：A large number of books are missing from the library.

图书馆的许多书不见了。

A large amount of damage was done in a short time.

短期内造成大量损害。

注意：The number of的意思是“...的数量”，修饰的可数名词作主语时谓语用单数形式；amounts of的意思是“大量的”，修饰的不可数名词作主语时谓语用复数形式，即谓语的数取决于 amount 的数。

常见修饰短语

只能修饰可数名词的

a large/great/good number of,a good/great many,dozens of,scores of,quite a few

只能修饰不可数名词的

a great deal of,a large amount of,quite a little,a large sum of

既可修饰可数也可修饰不可数名词的

plenty of,a lot of,lots of,a large quantity of,a good supply of