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grammatical number - What is the etymology of a pair of trousers - English Language & Usage Stack Exchange
Why do we always say 'pants' instead of 'pant'? What's the real history behind the word that being plural? - Quora
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English Grammar in Use Countable and uncountable nouns The Singular and plural 情景语法 5 :名词. - ppt download
American English at State - These nouns are always referred to in the plural form. Can you think of other examples? #AmericanEnglish | Facebook
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