请问twenty-year-old和twenty years old的区别
问题描述：
请问twenty-year-old和twenty years old的区别
什么时候该用twenty-year-old,什么时候该用twenty years old
答
twenty-year-old “二十岁的”,此词组相当于一个形容词用,只能作前置定语,即只能放在被修饰的词的前面.如 He's a twenty-year-old singer.twenty years old “二十岁”,此词组只能作后置定语或表语如 He is singer o...