years old 和year-old的区别和用法

year old,year-old,years old,years-old的区别 years old 和year-old的区别和用法 ten years old 和ten-year-old的区别 seven years old和even-year-old的区别 12 -year-old 和12 years old的区别 fourteen year old和fourteen years old和fourteen-year-old和fourteen-years-old的区别 year-old与years old的区别 six years old 和 six- year- old 和 six- year- olds的区别如题 数字 years/year old与 数字-year-old的区别 year-old和years old的区别好像是后面有名词year-old和years old只能用哪一个来着,记不住了 请问twenty-year-old和twenty years old的区别什么时候该用twenty-year-old,什么时候该用twenty years old 16-years-old和16-year-olds的区别 three-year-old 和 three years old 有什么区别 three -year-old 和 three years old有什么区别? 11-year-old和11 years old有什么区别 thirteen years old与thirteen-year-old的区别 英语13 -year -old 与13 years old的区别 three years old 与 three-year-old 的区别