twenty-year-old twenty years old 两个怎么用?

twenty-year-old twenty years old 两个怎么用? 请问twenty-year-old和twenty years old的区别 By next year,he ( ) twenty years old. 他20岁,是he's twenty year old还是he's twenty years old a twenty year old boy对还是a twenty years old boy对 用所给词的适当形式填空：1.I______(be)twenty years old next year. a twenty-year-old girl 、girl of twenty和girl twenty-year-old有 Ann is twenty years old.Lucy is eight years old. 《if i am twenty years old 25岁到底是twenty-fifth years old 还是 twenty-five years old i am twenty years old与 i have twenty years old区别? Passage 2Colin is a twenty-year-old young man. Two years ago