My sister bought this pair last month.Did she buy them here?

My sister bought this pair last month.Did she buy them here?

题目
My sister bought this pair last month.Did she buy them here?
My sister bought this pair last month.Did she buy them here?中的人称代词为什么用复数形式的them?a pair of shoes a pair of + 名词 都是复数的形式吗?
答案
My sister bought this pair last month.Did she buy them here?估计是一条裤子类似:pants什么的.a pair of shoes 是单数 a pair of + 名词 是单数形式,如果是 two pairs.或者three /four .pairs + 名词 就是复数的...
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