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 of twenty years old.(后置定语)
He is twenty years old.(表语)
希望我的回答能够帮到你,
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 of twenty years old.(后置定语)
He is twenty years old.(表语)
希望我的回答能够帮到你,