six-year-old boy和six years old boy 有什么区别?一样么?为什么?

six-year-old boy和six years old boy 有什么区别?一样么?为什么? 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 six years old 和 six- year- old 和 six- year- olds的区别如题 Tom is a six-year old school boy. The boy six years old this year.哪里错了 six-year-old和six years old用法有什么区别? six-year-old与six-year-olds的区别 my son,a doctor at a hospital,finished a physocal exam o______a six year old boy. 请问是six-year-old还是six years old还是six-years-old?(这个空签名有个a ) six years old,six-year-old,six-year-olds在用法上有什么区别?有six-years-old的形式吗? Mary,a ___ girl,is standing under the tree.A.six year old B.six years old C.six-year-oldD.six-years-old the boy six years old this year 翻译好恶＿＿＿＿＿＿＿翻译成英语 英语翻译Bobby,the six-year-old boy,was getting cold walking in the street in the snow. six years old与six-year-old有什麽区别拜托了各位 his younger brother ,who is ---- ,is in grade oneA six-year-old B six years old C six-year-young D six years young 为什么Six Years Old.中Year要加S呢? six six