few就是“很少，几乎没有”，而a few则表示“有一些”，它们都是形容词，修饰可数名词。a little和little，用法跟a few和few类似，区别就在于a little和little只能修饰“不可数名词”。
用法
1、There are a few things I need to buy.
我得买些东西。
2、There are few things I need to buy.
我不需要买什么东西。
3、There is a little water in the bottle.
瓶子里还有一些水。
4、There is little water in the bottle.
瓶子里几乎没水了。
