英语13 -year -old 与13 years old的区别

问题描述:

英语13 -year -old 与13 years old的区别

13 -year -old 做定语,后面要跟名词,如:He is an 13-year-old boy.
但 13 years old 就没有必要跟名词了,如:He is 13 years old.
不明白的再问哟,请及时采纳,多谢 !