Question

tenyearsold和ten-year-old的区别

Answer 1

ten years old 和ten-year-old的区别
意思上：
ten years old---10岁大
ten-year-old----10岁大的
用法上：
ten years old跟在系动词be后面做句子的表语。
ten-year-old放在名词前面做这个名词的定语。
The boy is ten years old.
He is a ten-year-old boy.