may is six-year-olds这样说对吗?

may is six-year-olds这样说对吗? 为什么six-year-olds 是正确的 six-year-old与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 和 six- year- old 和 six- year- olds的区别如题 the six-year-olds是复数还是单数呀 2道英语题目 谢谢大家了1.根据首字母填空you are s__ to say so. Jim is ___A.six-year-old B.a six -years-old boyC.six-year-olds C.six years old 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? He is two—year—olds对吗? Declan is like most other 15-year-olds. 初三英语变成形容词时要不要加s例1Sixteen-year-olds shouldn't be allowed to work at night.例2He is a six-year-old boy.到底什么时候要加啊? fifteen-year-olds是什么意思? seven-year-olds Twelve-Year-Olds翻译 -----olds are on the lake A.Five-six-year B.Five-six years C.Five six-years D.Five six years为啥选A my new friend is a ( )boy.A soxteen-years-old Bsoxteen-years-olds Csixteen-year-oldmy new friend is a ( )boy.A soxteen-years-old Bsoxteen-years-olds Csixteen-year-old Dsixteen-year-olds three-year-olds汉语意思 year olds还是years old?