six-year-old与six-year-olds的区别

six-year-old与six-year-olds的区别 six years old 和 six- year- old 和 six- year- olds的区别 five-six-year olds是什么意思与five six-year olds的区别是什么 six years old与six-year-old有什麽区别拜托了各位 six-year-old boy和six years old boy 有什么区别?一样么?为什么? six-year-old和six years old用法有什么区别? the six-year-olds是复数还是单数呀 may is six-year-olds这样说对吗? 16-years-old和16-year-olds的区别 sixteen-year-olds跟sixteen-year-old有什么区别? sixteen -year -olds和sixteen -year -old有什么区别 -----olds are on the lake A.Five-six-year B.Five-six years C