如何用英语描述一个人的年龄 4-year-old 4 years old 4 year old 哪个不对?
问题描述：
如何用英语描述一个人的年龄 4-year-old 4 years old 4 year old 哪个不对?
答
4-year-old 对的,一般做定语
4 years old 也对,做表语
4 year old 不对