twenty-year-old twenty years old 两个怎么用?

题目

twenty-year-old twenty years old 两个怎么用?

答案

亲,twenty-year-old为符合名词,实质上是一个单词；twenty years old 为三个单词,尽管二者的意思都是20岁,但是twenty-year-old可以做表语、定语；The twenty-year-old man doesn't know how to speak.而twenty years ...