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quantity的用法

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a large quantity of 后面跟什么名词?谓语动词是用单数还是复数?large quantities 后面跟的又是什么?
解题思路: a large quantity of 后面跟即可加可数名词又可加不可数名词,但中心词是quantity 用作单数,large quantities 后面跟即可加可数名词(复数)又可加不可数名词,但中心词是quantities,谓语动词用复数
解题过程:
a large quantity of 后面跟什么名词?
a large quantity of 后面跟即可加可数名词又可加不可数名词,但中心词是quantity 用作单数,如
a large quantity of water is
a large quantity of books is
谓语动词是用单数
large quantities 后面跟即可加可数名词(复数)又可加不可数名词,但中心词是quantities,谓语动词用复数,如
large quantities of water are
large quantities of books are
最终答案:略