few和 a few的区别用法详解：
1.意思上的区别
few 含否定意义，表示“几乎没有”，形容数量极少。
a few表示“一些”，不含否定意义，不体现数量极少。
There are few people in the supermarket.
超市里几乎没有什么人。
There are a few people in the supermarket.
超市里有一些人。

A few boys like playing football.
一些男孩子喜欢踢足球。
Few boys like playing football.
很少男孩子喜欢踢足球。


2.用法上的区别
few本身含否定意义，不与not等否定词连用
a few可与not等否定词连用

not a few: 相当多，不少
= quite a few

Not a few people like eating meat.
= Quite a few people like eating meat.
不少人喜欢吃肉。

Not a few people like watching movies.
=Quite a few people like watching movies.
很多人喜欢看电影。