a four-year-old boy可以说成a four-year old boy

a four-year-old boy可以说成a four-year old boy 请问:是a four years old boy?还是a four year old boy?正确要肯定的 帮忙翻译下my four year-old boy tried to start a mosh pit during naptime. a thirteen-year-old boy的中文翻译 a thirteen-year-old boy=什么? _____(a/an)1-year-old boy _____(a/an)8-year-old boy _____(a/an)11-year-old boy_____(a/an)13-year-old boy 为什么 a four-year-old boy中的year可以不加复数,而分数two-thirds中连字符后的third就必须有s? a twenty year old boy对还是a twenty years old boy对哪个等于 a twenty-year-old boy? a five-year-old boy还是a five-year old boy This____girl is so lovely.A.four years old B.four-years-girl C.four-year-old D.six-months-old 是a one-year-old boy还是an one-year-old boy a 11-year-old boy还是an 11-year-old boy four-year-old和four year old有什么不同 only four year old意思 帮忙把这句话准确幽默的翻译下my four year-old boy tried to start a mosh pit during naptime. My little brother is ____.A.a six-years old boy B.a six-year-old boy C.a six-years-old boyD.a six-year old boy a fourteen years old boy 在句子中对吗是a fourteen -year- old boy 10.Mr.Black has a ___.A.ten year old boy B.ten -years old boy C.boy of ten year old D.boy of ten