英语eight years oldeight years old eight-year-old eight-years-old eight-years old有什么不同
问题描述：
英语eight years old
eight years old
eight-year-old
eight-years-old
eight-years old
有什么不同
答
前两个是正确的说法，意思一样，第二个做定语用。
没有后面两种的说法，
答
第三和第四个都是错的
第二个相当于形容词
举个例子
He is an eight-year-old student.
用第一个的话就不能有an了
应该是
He is eight years old .