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fifteen-year-old 和fifteen years old 有什么区别?包括他们各自的用法

题目详情
fifteen-year-old 和fifteen years old 有什么区别?包括他们各自的用法
▼优质解答
答案和解析
fifteen-year-old 相当于一个形容词,修饰名词.
fifteen years old 是“数词+名词+形容词”结构.
比如:
He is a fifteen-year-old boy.= He is fifteen years old.