不可数.a  cup  of  milk  ,a  milk  ,一杯牛奶,一份牛奶时就可数,知道了么,英语应用起来比较随意的  抽象名词本不可数,前不加任何冠词,后用单数形式.we  long  for  freedom.但有定语修饰或有特定具体内容时可  加the  I  didn't  have  the  courage  to  tell  you.We  enjoyed  the  beauty  of  nature.Bob  spoke  the  truth. 抽象名词有些在表  “几种”,“几份”  的时候是可数的. the  visit  is  a  failure.His  plan  ended  in  failure.Christianity  and  Islam  are  two  different  religious.Religin  meats  more  and  more  to  her. it's  a  pleasure  to  work  with  you.I  have  a  respect  for  my  mother.There  is  a  beauty  in  simplicity.His  son  is  a  trouble  to  him.It'll  be  a  great  happiness  to  read  them. we  long  for  freedom. 有些词不同形式有不同意思  如  experience经验,experiences经历  decoration表抽象意义的装修,decorations  表（房内）具体的一件件装饰物  有些抽象、物质名词表抽象概念时是不可数名词,而表示具体事物时则为可数  youth  青春  a  youth  一个青年人  relation  关系  a  relation一位亲戚  必要性necessity  必需品a  necessity  glass玻璃  a  glass一个玻璃杯  ,copper铜  a  copper  一个铜币,tin锡  a  tin一个铁罐  paper纸  a  paper报纸、证片  （chopping  wood  enter  a  wood  表不同意思当然为不同词类,of  course）
milk是可数性名词还是不可数性名词