不过，随着时间的推移，许多以英语为母语的人认为它是可数名词的复数形式，于是就有了逆成词pea。
Many English-speakers over time thought this was a plural count noun, though, and so pea is a back-formation.
但当不可数名词前有表示数量的复数名词时，谓语动词用复数形式。
This is a collective noun. Though it appears in the singular form, it takes a plural predicate verb.
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