a few,few, a little, little 的区别

few或a few在句中修饰可数名词，后接可数名词复数；也可用来代替复数名词。few的意思是“很少”，“几乎没有”，含有否定意味；a few则是肯定的，表示“少数几个”，“有些”，与some意思比较接近。如：

He is a man of few words. But we all like him, he is a kind-hearted man.

There are a few bottles of milk here, you don’t have to buy now.

little 或a little在句中修饰或代替不可数名词。little表示否定，相当于not much; not enough，意为“几乎没有”；a little表示肯定，意为“rather有点儿，有些”。如：

-Would you like some tea?

-No, thanks. There is a little in the cup.

There is little water in the bottle, you need to get some.

a little还常用来修饰形容词、副词、动词，也可以修饰形容词或副词的比较级。如：

I work for 4 hours, so I feel a little tired.

My sister get up earlier than I. But she get to school a little later than I. Because she runs more slowly than I.

首先你明白few和little分别用来形容可数名词和不可数名词的。
加一个a就表示多了一点点，所以有a的就是有一点，没有a的就是几乎没有，用来修是不同的名词就好了