问题描述： twenty-year-old twenty years old 两个怎么用? 1个回答 分类：英语 2014-11-25 问题解答： 我来补答 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 old 一般只能作表语.如：He is twenty years old . 展开全文阅读
