问题描述: 请问是six-year-old还是six years old还是six-years-old?(这个空签名有个a ) 1个回答 分类:英语 2014-11-11 问题解答: 我来补答 如果这个空前面有个a,那就是填six-year-old,它相当于一个形容词,六岁大的.如He is a six-year-old boy.他是一个六岁大的男孩. 展开全文阅读