“a large sum of ”“quantity of ” 的数？

isuffering

large sums of + 可数/不可数名词------谓语复数
quantities of +可数/不可数名词------谓语复数

a large sum of +不可数名词-------谓语单数
quantity of + 不可数名词-------谓语单数

a large sum of +可数复数名词-------谓语单数or复数？
quantity of + 可数复数名词-------谓语单数or复数？

a large sum of +可数单数名词-------谓语单数or复数？
quantity of + 可数单数名词-------谓语单数or复数？

I'm not sure about the above “a large sum of ”“quantity of ”  的数.

Can anyone help me?thanks in advance.

atongmu

如果主语是后面的名词，则动词用复数；如果主语是sum或number之类的则用单数。
比如the number of students，主语是number；a large number of students，主语就是students。

isuffering

我明白了,浅显易懂, 谢谢.