twelve-year-old与twelve years old的区别及用法

twelve-year-old与twelve years old的区别及用法 twelve years old twelve year old twelve—years—old twelve—yea a twelve-year-old和 twelve years old有区别吗?如果有是什么区别 Tony is twelve ( )old.year years , two years old与two-year-old的用法区别 twelve years old词性 year-old与years old的区别 Tony is twelve years old.（对划线部分提问）划线部分twelve year old l am twelve years old He is twelve years old. I am twelve years old. years old 和year-old的区别和用法