13-year-old=13 years 如果是,那为什么哪?

英语13 -year -old 与13 years old的区别 _____ you 12 years old last year? yes, I _____ 13 years old this year. 13-year-old=13 years 如果是,区别在哪?tina is a ______ girlA 13-year-old B13 years old I have two brothers . they are 13 ( ) this yearA years old B year oldC years' old D year's old 13-year-old=13 years 如果是,那为什么哪? year old,year-old,years old,years-old的区别 为什么12-year-old=12 years old year olds还是years old? eight years old与eight- year-old year-old与years old的区别 two - year - old two - years -old two year old two years old 哪两个对》 our english teacher has___son.Aa8-year-old Ban8-years-old Ca8-years-old Dan8-year-old “-year-old” “years old”什么时候用“-year-old” 什么时候用“years old” 数字 years/year old与 数字-year-old的区别 I am 13 years old用13 years old提问 l am 13 years old ann is 12 years old I'm 13 years old five-year=old和five years old用法有什么区别啊