five years old 和five-year-old的区别为什么 She is five years old.不能说成She_英语解答

five years old 和five-year-old的区别
为什么 She is five years old.不能说成She is five-year-old be动词之后可以加形容词啊

人气：404 ℃　时间：2019-10-19 10:51:05

解答

five-year-old,"-"连接多个名词用作形容词的,只能用作前置的定于.不能作表语.be动词后面是表语.