it.
替你总结一下
可数单数用one替,ones替代复数词.
不定冠词后加one,one前一般有定语.(例:an interesting one)
替代若是本身物,it替单they代复.
比较句中替代词,不可数名词that替.(例:The population of china is greater than that of any other country.)
最高级及序数词后,替代词常常被略去.(例:the youngest (one), the first (one))
复数名词替代词,ones与those均用之,
特指ones加定冠,those之前无冠词.
One(s)的定语多在前,those的定语必后置.
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