a quantity of的谓语动词用单数形式。当"a quantity of"修饰不可数名词时,谓语动词使用单数形式。这是因为"a quantity of"作为一个整体,其后的不可数名词决定了谓语动词的单数形式。
a quantity of+可数名词复数、谓语动词用复数;+不可数名词、谓语动词用单数.即修饰可数或不可数名词均可,作主语时采取就近一致的原则,其谓语动词通常与短语中of后面的名词的数保持一致.
a quantity of+可数名词复数,作主语,谓语用复数
A large quantity of flowers were heaped on the martyr’s tomb.
a quantity of+不可数名词单数,作主语,谓语用单数
A large quantity of beer was consumed.Quantities of food were on the table.
There is a large quantity of fish in the boat.
船里有大量的鱼肉。
Alarge quantity of books were printed.
印刷了大量的书。
Quantities of water were wasted in this town last year.
这个镇去年浪费了大量的水。
There were large quantities of shoppers just before Christmas.
就在圣诞节以前还有过许多购买东西的顾客。