1）可数
   A 可以变复数
     book  desk  chair  window
     My books are interesting.
     I cut an apple into two halves.
     He is a young man.
     They are young men.
     My mum isn't a housewife.
     Our mums aren't housewives.
     Do the girls like flowers?
     These pairs of trousers are too short for the boys.
2）不可数(永远是单数)
             hair  music money  time  water  milk
     Her hair is black.
3)量
      a cup of water       two cups of water
        可     不可
4)不可数名词可以加s吗？
      two times 两次 twice
      one time       once
      three times-
5）区分可数与不可数的形容词
      可数   many books
   多 不可数 much water
      可数   few people没人
   少 不可数 little time 没时间
      可数   a few books 几本书
      不可数 a little time一点点时间
    a lot of time    a lot of people