比色管有什么用:我是初一学生，求一个英语问题~~~~~~~~~~~~~~~~~~~~~~`

a few , few 后跟可数名词
a little , little后跟不可数名词
a few, a little 表示还有几个，还有一点
few,little 带有否定含义，表示没有多少了

A few的意思是有一些，带一点肯定的意思，就是说数量还比较多。A few后面跟可数的名词的复数形式，如a few apples，a few schools等等.
例如:
There are a few apples on the table,you can eat them if you like.

而few意思是比较少，几乎没有了。但后面也是跟可数的名词的复数形式（毕竟很少也是有一点啊^_^)
例如：
Oh,don't eat any more,there are few apples on the table now.

至于a little与little修饰名词时也类似，带a表肯定，不带a表否定，但a little，little跟的是不可数名词，如water等
例如：
If you do a lot of sport but drink little water,you will get sick.
Make your bottle filled a little water so that you won't get thirsty.

总的来说a few,few,a little,little都用来修饰名词，表示该名词数量的多少。
带a的表示有一些，有一点，而不带a的表示没有多少，几乎没有。
a few,few后面加可数名词
a little,little后面加不可数名词

a few(肯） 一些+可数名词复数eg: a few books
few（否）几乎没有+可数名词复数few workers
a little（肯）一点点+不可数名词a little milk
little(否）几乎没有+不可数名词little time

a few , few 后跟可数名词
a little , little后跟不可数名词
a few, a little 表示还有几个，还有一点
few,little 带有否定含义，表示没有多少了
a few, Few 用于可数名词
a little, little 用于不可数
a few, a little表示很少
few, little 表示几乎没有，比Few更少。
a few&few 用来修饰可数名次 a little&litte 修饰不可数名词
a few&a little表示有一些/点 little&few表示几乎没有
eg.There's a little milk in the bottle.瓶子里有一点牛奶
There's little milk in the bottle.瓶子里几乎没有牛奶了
There are a few students in the classroom.教室里有几个学生
There are few students in the classroom.教室里没几个学生

a few 一些+可数名词复数eg: a few books
few几乎没有+可数名词复数few workers
a little一点点+不可数名词a little milk
little几乎没有+不可数名词little time
都是修饰不可数名词的.

a little 表示"有点",比如杯子有1/4的水,你可以说,a little water.

little你可以理解为"连那一点都没有了",就是"几乎没有",比如杯子里只有1/10的水,见底了,可以用There is little water in the glass.

few和a few 同理,把杯子换成盘子,把水换成几块cake就可以理解了.

a few(肯） 一些+可数名词复数eg: a few books
few（否）几乎没有+可数名词复数few workers
a little（肯）一点点+不可数名词a little milk
little(否）几乎没有+不可数名词little time

A few的意思是有一些，带一点肯定的意思，就是说数量还比较多。A few后面跟可数的名词的复数形式，如a few apples，a few schools等等.
例如:
There are a few apples on the table,you can eat them if you like.

而few意思是比较少，几乎没有了。但后面也是跟可数的名词的复数形式（毕竟很少也是有一点啊^_^)
例如：
Oh,don't eat any more,there are few apples on the table now.

至于a little与little修饰名词时也类似，带a表肯定，不带a表否定，但a little，little跟的是不可数名词，如water等
例如：
If you do a lot of sport but drink little water,you will get sick.
Make your bottle filled a little water so that you won't get thirsty.

总的来说a few,few,a little,little都用来修饰名词，表示该名词数量的多少。
带a的表示有一些，有一点，而不带a的表示没有多少，几乎没有。
a few,few后面加可数名词
a little,little后面加不可数名词

a few,few,a little,little都用来修饰名词，表示数量

但a little和little修饰不可数名词，如money/milk/water……
few和a few修饰可数名词，如papers/flowers/tables

a little和 a few表肯定意思，为“有一点儿”和“有几个”
little 和few表否定意思，为“没多少”和“没几个”

例：杯子上有一些水。There is a little water in the cip.
杯子上没有多少水。There is little water in the cup.

a few , few 后跟可数名词
a little , little后跟不可数名词
a few, a little 表示还有几个，还有一点
few,little 带有否定含义，表示没有多少了