few,a few,little,a little

few,a few,little,a little
虽然都表示“少”,但
（1）few,a few是可数的,little,a little是不可数的.
（2）a few,a little含肯定意味,few,little含否定意味.这里所谓的“肯定意味”和“否定意味”应该这样来理同样是半杯水,口渴者会认为：There is little water in the glass.而不口渴的人则会认为：There is a little water in the glass.
一：
1．few修饰可数名词复数.
2．few (= not many; hardly any)含否定意义；a few (= some; several; a small
number of) 含肯定意义.
3． not a few = no few = quite a few = a good few = many.
4． 当 few受 every,last,past,next,some,very等词所修饰时,表示肯定意义,few之前不再有冠词.如：
In the last few minutes,he checked up his paper again.
It took us some few days to repair the machine.
They are very few in number.
There were too few of them.
He goes to see his grandma every few weeks.
5． 在非正式文体中很少见,一般用或代替,如：
Only a few people attended the meeting.
另外,little / a little
Little remains to be done about it.(作主语)
A little remains to be done.
Please give me a little.(作宾语)
He knows a little of everything.
There is very / but little time left.(作定语)
Don’t worry; you still have a little time.
1． little修饰不可数名词,表示“量”.
2． little含否定意义(反义词：much)；a little含肯定意义(反义词：none).
3． 在非正式英语中,一般很少用little,常用not much,only a little来代替,如：
We haven’t got much money / time.
你的这个问题百度知道上已经有人解决了.我转载了一个比较详细的给你啦!

few和little是“几乎没有”的意思，是否定。
a few和a little是“一些”的意思，是肯定。
few后面跟不可数名词，little后面跟可数名词。
可以去查词典，上面解释会很详尽。