数字 years/year old与 数字-year-old的区别

问题描述:

数字 years/year old与 数字-year-old的区别

说一个人几岁,用year old主要有两种形式
比如说他4岁
He is four years old.(做表语)
He is a four-year-old boy.(作定语)
记住,有连字符的只能作定语