amounts of修饰可数还是不可数

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。
1、a large amount of修饰不可数名词。
例句：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、a large number of 修饰的词作主语时谓语用复数形式
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。