1.a large amount of +不可數名詞，謂語動詞用單數；
例：A large amount of money was spent on the bridge.
在這座橋上花了大量資金。
2.large amounts of+ 不可數名詞， 謂語動詞用復數。
例：Large amounts of money were spent on the bridge.
在這座橋上花了大量資金。
3.偶爾也可見到其後接復數可數名詞的用法，但不算普通。如：
The shopkeeper had a large amount of oranges in his storeroom. 店主在貨倉裏存有大量橙子。——摘自《朗文當代高級英語詞典》 Even small amounts of these substances are known to cause skin problems. 我們知道這種物質即使是壹丁點也會損害皮膚。——摘自《劍橋高階英詞典》