我知道的有这几个：
some
some of
a few
something
a number of
一、some 一些
1) 可与复数名词及不可数名词连用.
2) 当做"某一"解时,也可与单数名词连用.(= a certain)
You will be sorry for this some day.
总有一天,你会后悔这件事的.
A certain (some) person has seen you break the rule.
某些人不同意你的看法.
二、a few表示有肯定意思,有几个;用来修饰可数名词.例如：
He has few friends here,he feels lonely.
他这里没朋友,他感觉寂寞.
There are a few eggs in the basket.篮子里有几个鸡蛋.
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